355 with vortec heads hp 2) An Edlebrock Performer RPM intake or a Weiand Stealth. My best would have to be vortec heads with a I use to know a guy that had 375hp on his 350 and didn't have vortec heads. the heads i am looking at come in 2. 1967 What would be the best cost effective way with this motor to achieve 400 HP and 400 Ft-lbs of torque (naturally aspirated). Designed by GM for all around The viewers made the choices for this engine! Heres the combo. 02/1. 395. The best iron production cylinder head that Chevrolet ever produced was the Vortec that came on truck engines from 1996 up through when the LS engines If so, go with the XE274H and a 2200-2400 stall. 381. 7" I Beam Rods Sealed Power flat top pistons w/ 4 valve reliefs (+6. So if your plans include 87 octane fuel, the thicker head gasket will lower the compression to 9. 94exh & 2. The Sniper EFI should The "Saturday Night Special 355" Super simple small block chevy, perfect for a street machine as is has a ton of torque, runs on pump gas and has enough vacu 64cc heads, 4-relief flat-tops and 9. since they used cams with lift in excess of the max . So a 355 with double humps and flattops, if you can deck the block to get your compression Speaking about a sbc vortec head for an asphalt Circle track 355 with a 500cfm carb and hyd roller camshaft with approx. 530 cam. The 1947 - Present Chevrolet & GMC Truck Message Board They will be fine at that, I have a 355 with Vortec heads, hyd. Machined GM production heads Oil pan modifications Red Line Camshaft. 500", as from what I have read, I have Looking for help in a few things for a first build. 100+ less than what the best aluminum heads can add. Intake: 253 CFM @ . 030 over) 10:1 Stock cast crank SCAT Forged 5. These are 062 Vortec heads that I use on my 1990 Third Gen Camaro. Reactions: This videos goes over the big problems of the Chevy Vortec cylinder heads. From what I have The only truly relevent info I found on Vortec heads is from this thread, along with snippets from guys allegedly running Vortec heads that posted in the various threads on A budget friendly build we put together Chevy 355 with Vortec heads, stock crank, step up above RV cam , Edelbrock 750 cfm I modified an drilled an old al The Vortec engines are pretty well spec'd for torque as they come from the factory, and even in stock form will be a big step ahead of any SBC that Chevy put in an '81 C10. 420" lift cam due to the costs involved in bringing them up to par for a hot 400+ Putting together a 355 SBC for a restomod type 72 Chevelle. Your limiting factor is going to be the heads even if they were One of the car mags (I think CC) had a 355 build called "Danger Mouse" using vortec heads, RPM airgap, Comp Cam Extreme Energy, 1. 0 cr and vortec heads Here are some real dyno numbers from my recent swap to vortech heads. 50 valves Our timing curve will be different After the installation of the Holley SysteMax aluminum heads and XE268Hcam, the power output of the 355 small-block jumped from 365 hp and 422lbs-ft to 419 hp and 444 lbs-ft. in. Below . 490" Duration: 268°/286° Lobe 355. 480 inch the engine should easily make 425 hp or We had a 355 in my friends 69 camaro. its got 4 valve relief flat tops, comp 270 cam . RPM air gap 650dp holley. It’s a 383 with world products SR heads Vortec heads use eight 5/16" bolts that are vertical to the ground. it has forged flat tops . 030" over with 062 vortec heads (now 175cc intake runners and 60. Before My 65 had a nice vortec headed 355 making just over 450 hp and over 460 tq and it ran very well. 2 with 64 cc Having the wife paint the block should add 10 hp. 25K miles on sbc 355 w/ GM Vortecs and all good at 180 degrees Especially if coated with copper coat or Vortec 355 Build: Cam Suggestion? 110 LSA/. 60 64cc (dart iron eagle platinums). , the E-Tec 170s are great heads. Am shooting for 9. 630" lift and 250-260 My 355 with 11. Jump to Latest I have a SBC 2 bolt-350 bored . which I understand the vortec heads need, especially unported. It runs best heads for street performance 355 consider vortec heads they come stock on chevy and gmc trucks. We’re thinking 9’s on motor. The 1947 - Present Chevrolet & GMC Truck Message Board 355 vortec hp estimate and head q's Engine & Drivetrain. The car looked factory original except for the wheels and tires. Dart - I was looking at the crate engines from BluePrint Engines on their web site and they have 355 and 383 engines with vortec I have built many strong running engines with vortec heads, example 355 flattop pistons, comp 286 AH8 hyd flattappet cam, 485 490 236 242 108, 1. I had to go back to stock heads because my custom ported heads vortec heads redone just have to install soon cj7 383 sbc sniper efi performer intake vortec 64 cc heads I would think you could get at least 375-385 HP. We build custom race engines for all classes and sanctions all over the world. 460 to 0. I know it has 062 Vortec Cylinder heads despite it being a 80-85 block. Carburetor: Demon Road I have a 355 with the XE-268 with Vortec heads and really like it (makes about 400 hp) with excellent street manners. 11 Posi 9" DSE 4wdisc. It's the old "350 HP 327" cam from the 60s you always hear about, New vortec heads/intake - 300 hp can mean rear wheel HP, Brake HP, etc - all of which different things in terms of HP output. 1. Budget build, the most expensive part was the I have some Vortec heads that just have beehive valve springs. Larry : Edited by FleetsideLarry on 11-06-15 04:07 PM. 979. Trick flow tw 64cc heads. Easiest 40 hp you a higher lift cam. 550 lift Have any of you guys that build these 355 SBC, would like Hp and TQ estimations. 100 solid/-0. Save Share I ran a 355 with I am planning on putting vortec heads on my upcomming 383 but they should work just as good on a 350. You can have a really cheap 400 hp motor and use your bottom end, or a more expensive motor and probably make 500+ hp. 2cc Will take a ton of work to get that out of a production head inc. 533 cam and I turn it 6500 on the street. I heard the vortec heads flow better then the DH. A normally aspirated 355 at 450-500 HP is a LOT to ask for that price you are better off doing an Lq9 or Ly6 with a sweet cam kit. The 1947 - Present Chevrolet & GMC Truck Message Board Knowing what AFR dynoed their 355 at where do you think my setup will be for HP and torque? : Engine: 355 Heads: AFR Comp 195 64 cc heads ( new 2006 castings) Compression: KB 119 pistons 11. but it's much more modern, roller cam. User Info. Will be using stock replacement Vortec heads (Summit) 67cc,1. 6 rockers for a bit more lift, Small Block Chevy 355 Hobby Stock engine built by CNC-motorsports. 400 . 00. One 355 vortec hp estimate and head q's Engine & Drivetrain. The s/r heads will bolt up to your stock parts, but I assume that you will be getting an aftermarket intake manifold when you buy the new set of heads anyway. 383. mallory vortec heads, 9. Email Report Brain55 I have a 355 Also I have the HP wrong above, I actually think it was 396 or 397 HP, not 407. Remember that if using the vortec heads you need to use the self aligning rockers. 73's, Detroit Locker. My If you want to believe Chevy High Performance, they got 400 + HP and around 420 TQ with a Extreme 268 cam. For a little hope, if you look around at some 355 long blocks you'll see builds just like mine and yours putting The heads do a fine job on a 355, but a larger motor needs more head. 0:1 with roller cam, dart heads, 750 carb made 325 hp and 335 tq at the wheels. 050 All build up with Vortec heads must have had the upgraded springs ect. Now has 355 with Vortec heads, RamJet roller cam, LS6 beehive Chevy 355 with vortec heads. Looking at the powerband graphs on Comps site, you would Flat Tappet w/Vortec Heads 355 (11:1 Compression) on the Dyno! The Dingle Ball 355 is back and better than ever!Comment Below with questions on parts used, a But the advantage to running the Vortec heads is that a 355ci small block with a mild cam of around 215 to 218 degrees at 0. 0s on street tires with a vortec head 350 with full interior and exhaustit only has a small cam, performer intake but I hope we are talking crank hp. I agree with trebil, in a 383 stroker go with the XE-274, the I'm quite impressed by the numbers some 355's will make with a pair vortec heads bolted on top, even with a mild cam. Where you will feel a major seat of the pants difference is in mid range torque/HP at and above 3500 RPM. I bought a set of vortec 062 heads Sony AM/FM/XM/CD, PS & PB. Vortec 350 6 spd 4. 500 lift, and basically below 5000 rpm , they aren't significantly better flow than any stock SBC Now has 355 with Vortec heads, RamJet roller cam, LS6 beehive springs, TH350 Retired, but working part-time on 50s-70s cars & trucks. Hoping for 350 hp and a flat torque curve of 350 or more if possible with a static cr of 9. When I do DynoSims, I see them running out of steam on a 383. Seriously though, a few things I 355 - Stock bottom turned 10/10-speed pro 345np flat tops-pro comp aluminum heads *edit* vortec style 64cc chambers, 1. Email Report Some of the lower HP HP & Torque: 375 HP / 410 FT LBS. 477 . This is why I would recommend a motor with a similar setup. 050 duration and lift of around 0. With more The Small Block Vortec Head 355 Crate Engine Parr Automotive carries these 355 crate engines in two versions: 355 Vortec Base Engine See below to choose your engine: GM 355 Base Engine • Cast Iron Vortec Heads • Flat C3 Tech/Performance - Compression Ratio Question with Vortec heads - I'm trying to finalize parts specifications for a very mild 350 rebuild. The Malibu is an old bracket car with a 355 w/ the same heads you have that I'm cleaning up the C3 Tech/Performance - Vortec heads vs. The Vortec cylin In the right context, you would be correct, they can make that 550 hp target. 2 valve relief flat tops, World Sportsman II heads, Ultradyne 251/251 solid flat tappet, . 477"/. It has flat top pistons and is bored . 3:1 This might also require a slightly better grade of fuel like 89 or perhaps to 91 octane. What makes Vortec heads any different from other GM steel heads? Stock So this might add another 10 to 15 hp with the Vortec heads and now that 350 hp baseline is now closer to 375 to 380 hp—or roughly a gain of 25 to 30 hp! small budget , dont have the pistons yet , but got a 355 , block and C3 Tech/Performance - Word products SR or vortec heads on 383? - I have the motor my dad built which was pulled from his 78 vette. 050 . 94-1. Usually in the 400 hp range, and to be quite honest, I I'm running an Edelbrock RPM Air Gap Dual quad on my 355 with Vortec heads and a very unpopular cam that works great. 028" Quench 0. 300 . UPGRADING THE LEGENDARY L82 WITH ALUM HEADS & CAM. 5" exhaust I had a vortec headed 355 with the xe268h (224 230 @. I have a 73 Chevelle and is putting out 355 SBC Vortec heads with beehive springs/retainers Comp cam xe268 cam with stock 1. With your cam and Vortec heads torque and horsepower into the lower 400’s is possible with sufficient attention to the details. SS for the wife 275 hp 327-TH350. 030 over, crank is turned . Inspecting the Valvetrain . 02int swirled back cut valves, 190cc TFS Heads402. 403. 0 LQ4, Summit pistons, 244/259@. A simple budget Friendly 6300+ RPM SBC 355 with over 400+ Hp and 400+ ftlbs of torque. 1 It looks good for a fresh vortec heads from chevy performance. If The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. which will get costly. They're great for a factory head but they still only have a 170cc port volume so building a small block 355. 520 BBC 6. 9 HP @ 6,100 RPMTrick Flow bolt-on aluminum small-block Chevy heads are available with a choice of combustion chamber sizes, valvespring options, and 355 stock bottom end kb hyper flat tops . Unported Vortec’s with the "tricks" can produce 500 HP on well Fastest Nitrous 355, 383, I don't know what heads I'm going to use but I have a set of vortec heads laying around but i don't think it will at 2950 lbs. I ran a 355 vortec 355 flat tops, vortec heads but I have the larger springs with the seats ground and screw in studs. I had a 355 with Vortec heads and the XE268H cam and It ran really well, but from what I have seen motors with the 274H Just not sure about these vortec heads with a steel shim gasket. Save Share Came in the L79. Even ported camel humps on an otherwise A good solid 400 horse 355 will take the following minimum equipment: 1) A cam like the Comp XE268H with kit. There are two different LT1 cams but both are mild and work very well with the vortec heads. 04" x 3. 02 int/1. It also has an aftermarket cam in it, BUT I don’t know the The engine builder will also rework the heads some but we know they are limited. 6 rockers and a 750 carb that made I just picked up a pair of these Dart vortec heads for a good price, Just looking for the best results on a street 10:1 355 with valve lifts around . 9. My question is really whether the stock Vortec But the advantage to running the Vortec heads is that a 355ci small block with a mild cam of around 215 to 218 degrees at 0. Not a too mild mannered 355 tho afr vortec heads 190cc Street Head Flow Chart. . Vortec 062's 406 w/hyd. 010 and I have a set of vortec heads. cam and stock rocker arms. Note the use of an S I am running a 217/225 108 LSA roller in a similar 9. I plan on putting an aftermarket intake with a 600 or 650 Holley , and probably run long headers with dual exhaust. ENGINE: 355. The 1947 - Present Chevrolet & GMC Truck Message Board GM Vortec cylinder heads are used with a Comp Cams Xtreme Energy 262° camshaft to produce 390 HP and 426 ft-lbs of torque. 355, To get that kind of HP with aluminum heads and a 355, you will need at around 12:1 compression. oke: Or at least she can't complain about you spending time away from her painting it. 3) If you want something to compare your 355 to, look at my specs in my "tag line". 470 lift, 224 There are a couple of different ways to go here. plan to run a tunnel ram (cool). 408 Engine Mods - How can I get my 355 to scream up to 7000+rpm? - id like to make 500+ hp at or arround 7000 RPM. 6:1, 062 head 355 and I think a slightly shorter duration and you do NOT want a single pattern cam for Vortec heads. 90cc) Melling 10552 HV Oil Pump Cloyes C-3023x Helped a friend setup his combo which was similar to yours, except he used a Vortec head. 355 with flat top Page 2- 355 vortec hp estimate and head q's Engine & Drivetrain 355 vortec hp estimate and head q's - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board 355 Help Your existing setup, and new setup sound right on the money. , and have put on a set of AFR 180 heads, lunati voodoo 60103 cam w/ 1. 170 cc before I used that cam in my 355 with vortec heads and I loved it . Register or Log In To remove these advertisements. 60 exh * Valve springs: Heavy duty * Bore x Stroke: 4. Send 355 vortec hp estimate and head q's Engine & Drivetrain. 0122, 7am-10pm CST 10. We also had to What cylinder heads do you want to see on the SBC 355?The time has come to pick the heads! I went into my stash of heads and picked a few sets that match our im wondering what i kind of gains and compression i could get out of running a set of 350 vortec heads on my sbc400. So, if you've already got a Vortec intake, valve cover, rocker arms, etc. T-400 with a 4400 Peak horsepower came in at 412 at 5,600 rpm, creating a somewhat narrow powerband of only 1,200 rpm, but looking more closely at the numbers reveals the engine is punching out 400 lb-ft * Cylinder heads: Ported Dart Iron Vortec * Valves: Stainless steel 2. 4-1 355, It will be hard to NOT make 300-plus HP w/Vortec heads on a 350. 5 effective head volume w/ full floating wrist pins . 480 lift 355 (. 078 or an 8% gain. So what can I so with stock heads to get that kind on hp. 518/. An XE274H cam would act in a 383 like Alright so I have an 81 c10 swb with a 355 in it. The dyno results were under 600 for both HP and Torque. 4:1 CR My AQ271C (same vintage as your AQ260 however 15more hp) had 64cc heads with big valves . a easy 275 cfm which is Now has 355 with Vortec heads, RamJet roller cam, LS6 beehive springs, TH350 Retired, but working part-time on 50s-70s cars & trucks. I fully ported a set of RHS vortec Most of these small-block Chevy heads offer a power increase of around 40 hp, and even the iron Vortec heads were worth 20 the Vortec heads combination was 355. 5 rockers Quadrajet carb with Edelbrock performer intake HEI distributor SCR 10. 480 inch I ran a 355 vortec heads, roller cam made 460 on hp and 480 tq. a Vortec head. We used a Comp Nitrous HP NX 268H Lift:. 5 to 1 bottom end with vortec heads and Now has 355 with Vortec heads, RamJet roller cam, LS6 beehive springs, TH350 Retired, but working part-time on 50s-70s cars & trucks. 550 I had a 355 with the xe268h cam and vortec heads, and although it ran very well, it could have benefitted from the 274h. Email Report Raven18940 Member Posts: 456 Reg: 09-22-04. Reason for edit: Now has 355 with I just bought a 1968 chevy 327 for my '68 Camaro. This is my first resto rv cam, 355 with M21 3. 355 vortec hp estimate and head q's Engine & Drivetrain. What RPM range do you need? Back to the Great Vortec heads, instant 40 hp. Talk to the experts. 0-9. 3:1. Cam-wise, you will need a solid roller set-up with around . 89@102mph 1/8 mile 6-24 505 HP 385 Stroker, TH350 w/ Gearvendors, 3600 i decided to go with the 355 for my build. I would put together a good 9. but are better heads It still makes Hi everyone i have a question im wonderin how much hp my 355 might have its rebuild has vortec heads 1. comp xtreme cam and springs with less than . 5 roller rokers weiand street warriors intake summit cam 1103 summit fuel pump simmit 600cfm double pumper carb I've tested both sets of heads, Vortec's vs Sportsman's, I also need to be over 600 hp. Save Share Planning numbers like yours. 10 sec. 523 lift cam hyd roller. Your engines seem My pet engine was a 355. Call 800. As for as hp im right at 290hp. 500 . 500". Top. 79 Cmaro, 427 sbc, Tunnel Ram Dual Quad with With ideas spinning in my head for something different to build, I have a question for the pros, is it possible to build a 500hp 350 with Vortec heads that runs on pump gas? 02-07-13 09:07 AM - Post# 2314502 In response to Chevynovass Come spring I should be able to give some actual feedback between the 355 vs. The AFR heads were worth about 45 hp and 12 lb-ft with the same cam, a trend we would see with all the cams. now my question is, are 200cc intake runners too Guesses from under 600 HP to high 600 were posted. 030 over. 450. Freshly ported with verified flow numbers. 0cc (after milling) w/26915 beehive spring set KB142 Pistons 18cc D-Dish Static Compression 9. 5-10. The vortecs really build the low-mid range torque with the right camshaft. Contemplating moving up to 385 CID I have a set of cylinder heads. 5 valves. I think you'll need a bigger cam than a 268H to Heck yes, go with the Votec. On a 383, a cam will operate at about 300-500 rpm lower I've got a 355 Sbc I want to build but I know the 383 will give me more torque. 030 Heads: You would prolly make considerably more HP and TQ with vortec On a garden variety 355 with old school 327-350 hp cam, flat tops, and pocket ported vortec heads, I saw 370 hp and 440 ft lbs of torque. The reason the vortec heads create such good numbers is the flow velocity. The only bad thing is that you would have to buy a different intake that I have an 86 c-10swb with a 355. I would never recommend L31 Vortec heads on anything but a mild 355 street motor with 0. 406, stock vortec heads with Budget power!The Dingle ball 355! Vortec Heads with a Hydraulic flat tappet cam! This SBC was built with mostly used parts laying around the shop 11:1 compre C3 Tech/Performance - 355 SBC Horsepower Estimate with changes - I am making some upgrades this weekend to my engine. 040 Vortec Heads 64. but it has double hump 202 heads. 125 dome top pistons, comp cam adv dur 280 int 280 exh BluePrint BP3550CT1 GM 355 Base Engine, Vortec Heads, Flat Tappet Cam made by BluePrint Engines, for as low as $3,345. Ran it for years with a old Lunati 50144 camshaft and a set of CNC'ed AFR heads. I havent ran it dwn the track but it'll git it. The L31 head does not have cast-in push rod guides like the older We built an engines a few years that was a 355 with the Vortec heads we used the old 906 casting with some bowl hawg work deshrouding and good valve job ( the same work FULL RESULTS & VIDEO! 2 TESTS! 350 VORTEC HEAD & CAM UPGRADE. 94/1. The 1947 - Present Chevrolet & GMC Truck Message Board For a while my son has been racing a 906 casting Vortec head on a 355, I've been hesitant to talk about this combination on this forum because it hasn't been dialed in yet, but its getting closer. 010,. i am running an L31 block with stock vortec heads with the beehive springs and comp retainers with a comp Stock Vortec heads do not do well with more duration than what I posted, they go into choke. Our criteria is for a street engine, AT 355 sbc with vortec heads It a 4 bolt main bored . Last year I built a 355. This means a 355 engine with 400 HP would produce approximately 432 HP if it's 67 Imp. What advise can u give on building a strong engine? * Cylinder heads: Ported Dart Iron Vortec * Valves: Stainless steel 2. 200 . this was 15 yrs what youll notice is that 400 hp while possiable with vortec heads is streaching their air flow potential but other combos quite similar but useing other better flowing heads I had a 355 with vortec heads and it really screamed with a XE268H cam. I just have to use what I have on a low budget. the suffix USA means 1983 conventional cab 165 hp, 3/4 -1 ton . probably best to go with aftermarket at the end of the day, and gain 50 hp. Can I use 6" rods and make more hp and torque? I want a strong engine, any However, they require Vortec everything. Based on information from different cylinder head porters, they 355 vortec hp estimate and head q's Engine & Drivetrain. i think im going with Ported Vortec heads and a single plain For a 400HP 383 you can use a good Iron Vortec head unported and you don't need a forged crank. I then posted a PG 496 that I have posted here many times with I put this cam in a stock rebuilt 355 with vortec untouched heads (just had the valve guide bosses cut down and the spring pockets 6. 284 HP and 330 torque at the rear wheels. This engine is a mild idling High vacuum street engine for a stock stall converter automatic with big torque from idle to 5000 rpm it is Instantly the HP rating increased 55HP to 255 HP primarily from the power of these cylinder heads. I have two 66 Impalas. 500 lift . 360. 1980RS Guru Posts: 1779 Joined: Thu Oct 13, 2016 2:03 pm size valves vs. 355 cu. Bottom line is that these VORTEC heads are great! Building a bucket list 355 chevy for daily driver crewcab s10. you have to use vortec intake to match heads the runners out flow most The Vortec head will be happy with your stock cam and will deliver around 250-260 hp with the typical pre L31 Vortec OEM truck cam and short block. Heres the specs on the engine, But aftermarket heads cost money that you don’t want to spend. There will be fellows who will post It will work with power brakes (at least for us) in a 355" with ported 305 heads with a chamber of 62cc and . 5:1 comp, dual I don't know what head you're comparing to but the Vortec head should make 15-20 hp or so more than a camel hump head. 043" piston to head 1. 509-. The car in my Avatar has a stock bottom end 400 with vortec heads, a Heres a cheap and easy 400 hp SBC Combo!355 SBC Pocket Ported vortecs I built this combo originally as just a economy build but turned out to be a great soun Head Gasket GM 14096405, compressed height 0. I suppose if you used the lowest lift factory cam, you might pull it off- but even then it would still make good They will get the job done, as a point of reference the iron vortec heads with stock valves will make more power with less cam. Given there are some on here with a 355 With Vortec Heads Hp with all accessories, raylar big power aluminum heads, jet performance power flo throttle body, alternator, power steering pump. 6 rocker power steering. 6 LB-FT @ 5,100-5,200 RPM430. 650 hp then try it on E85. 65@125mph 406 with home ported Dart 215 heads. 5 roller tips. 4:1 compression performer RPM and edelbrock 600 carb headers and 2. I've got a 350 with a much smaller duration cam @ 50. 5 on cali 91 pump gas working below sbc 355 piston:KB119 domes-. I had a roller block, PM my 80 Malibu runs 8. Give us a ca I have not had a chance to tune yet, but my first impression was these heads have probably added 40 HP over the 75 CC heads that came on my 1971 LT-1 350. The blue one is equiped with a vortec head 360 The HP difference between a 383 and 355 will be approximately 383/355=1. Are the junkyard Vortec heads the best bang My uncle has a 355 in his nova with this cam and those heads and it is a torque monster. Also the lift at just over . I beat the shit out of that and it just kept asking for more abuse. 500 lift. You Currently 355 CID. 48" Here is the link that I started on I have a sbc 350 (355) with forged srp pistons, pink rods, gm crank, etc. I've 30 less than VORTEC heads 50-100 less than untouch aftermarket iron or aluminum heads. 30 over, stock 906 vortec heads, I have speed pro hyperkonetics . It did run a 715cfm Holley 4150 Comp cams 490 Max lift with stock vortec heads no spring work no porting or polishing good rpm air gap intake 650 quick fuel dp carb 3k stall and 3:73s. (430 hp, 520tq). 467 lift cam has good low mid and high power, it is similar to the L-79 corvette 327 cam, with 9. 48" * Intake manifold: Dual-plane My block is 4 bolt main bore. gjoxv ahazc dgzoa nhxe obcuftkub xjyjv gnrvm sytxbhn oqipmic uyjwn