This has probably been covered to death but here goes, I got a 327 and I want to run a T5 with it, which flywheel/starter combo do I need? Is it a 153 or 168 tooth flywheel? If anyone has part numbers....gimme.
Is your block drilled with two starter mount holes or three? If memory serves right some blocks were only drilled for the starter for the 153 tooth flywheel in that time frame and guys had to drill the other hole to run the 168 tooth flywheel. If it has three you can use either and the the choice may depend on what bellhousing you run as some aluminum bellhousings only work with the 153 tooth flywheel and matching clutch. Those also clear floor boards a bit better than the larger 168 tooth bellhousing.
55-85 flywheel 12. 3/4'' diameter takes a 10.5 clutch the later style physically will not fit. 86 /\ BEWARE when buying a bell housing go here https://www.4speedconversions.com/chevy-bellhousings.html you want the 153t bell - so no truck or 168t bells ALSO you do not want the 383 1963 corvette bell house - why? it has a smaller central register in it. - I>E> the bearing retainer in your chevty / Muncie pattern t5 has an outer diameter smaller than what you will have in your chevy t5 of 4 5/8ths - some thing like that you want a world class Timken bearings Muncie eared main case. you want the 2.95 1st gear - 1 spin on input shaft = 2.95 rotations of output, whilst in 1st gear gearsets standard on v8 camaro/firebird. also came in v8 mustang - BUT NOT ALL years, i.e. a 86 stang has the 3.35 set - or v6 so, you will need the s10 tail?? do you need the v8 camaro input shaft 26 splines - 8 3/4'' is the depth of the bell housing on a slanting v8 305 camaro the same as the depth of the bell housing on say a 1968 corvette plus do they take the similar id and od bushing
so, knowing a 1969 327 has the large journal crank knowing a up to 67 327 is small journal. is there anything to balance? why are there 3 different part numbers for the early 153t flywheels, is my question.
There were no external balance weights on flywheels on any Chevy in the 1960s. How about a link to the 3 flywheels you're talking about, so we can see?
No balance issue with small or large journal but every now and then one for a 400 sb gets involved. Ya don’t want that one.
Nobby, the casting number you referenced (‘383) and full casting no. 3840383 is the correct bell housing for the majority of GM stick transmissions. There are other bells that will work but some will be unique applications- Chevy II, Monza, second gen Camaro, etc. It is the 1963 only, casting number 3788421 bell that has the smaller, 4 1/8” register hole for the newly introduced Muncie 4 speed. There is also a bell with a larger register hole for truck transmissions. The above screen shot shows the 15 pound nodular iron 3991406 flywheel for ‘55-‘85 265-350 SBC and 396-427 BBC. There is a new p/n for that ‘wheel- 14085720. GM also used to catalog an externally balanced ‘wheel for the 454 under p/n 3963537. Bottom line is this- we have 3991406, 14085720, and what ever number was in the listings for the standard gray iron ‘wheel BITD for the engine the OP is using. Casting numbers on the back of ‘wheels are not the same as part numbers. @anthony myrick shows good photos to ID the garden variety ‘wheels. One last thing for @Groovybaby6, for the 153 tooth wheels you want the starter with mounting holes straight across from each other.
tracy corvette has a few I see, casting numbers not the same as part numbers = great!! there is a bell with a casting number ending in 383 that is the 4 1/8 - watch out!! - the chevy 2 oneon that link/\ that's mine - so its from a corvette>?
OOH, While I am on.... I have seen a ford cased t5 fitted to a chevy Muncie bell with an adaptor looking at the adaptor it appeared to be about 1/2'' thick.... so IF the ford input shaft is 'total' 9 1/4'' and the chevy camaro t5 input is 8 3/4 do you 'need' the shorter input shaft of the v8 camaro t5 IF using a camaro t5 case. whats puzzling me is the depth of the t5 camaro slanted over bell and , say a 67 corvette version as for me, as I have a empty Muncie wc t5 case, I will need to buy the input, the 2.95 wc 1, 2 and 3rd gear the 070 counter shaft. last question. where does the stick come out on a 35-40 with a chevy v8 and t5 - with an s10 tail. would a ford mustang tail clear the seat, oh, is it a typo that the clutches are 10.5 when they are 'all' really 10,4.
My pics are the generic every day stuff. The 153 wheel and bell are from a 1st gen camaro. The truck wheel and bell is 70s to 80s truck stuff.
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