I have a T5 behing my 350 right now and i want to do a cam swap. If I do that I know the T5 won't hold up very long. I have a T56 from a 97Z28 in the garage. I was wondering if I can use the flywheel I have now and just switch to an LT1 starter or if I need to get a new flywheel too.

 

you should use the lt1 flywheel it has more area for clutch engagement,larger clutch 11" instead of 10.4

 

You must use the LT1 flywheel with the LT1 clutch and transmission setup.

Be aware of the differences in flywheels between 1-piece rear main seals and 2-piece rear main seals. All LT1's have 1-piece flywheels. If your engine is a 2-piece you will need a special aftermarket flywheel.

 

Well the motor is a 86 up roller motor so it's a 1 piece RMS. I knew the LT1 clutch was 11 inch instead of the 10.5, but what I was wondering is if the flywheels on the TPI cars are actually a half an inch narrower accross.

 

the flywheel from the tpi cars wont work with the t56 totally 2 different setups u need ALL the stuff from the t56 to swap them over cause the clutch setup is totally different

 

I used a special 10.9" clutch from McLeod when I had a T5, so I'm guessing the T5 flywheel is 11" across also.

 

My question is along the same lines but the other way around. LT1 motor and flywheel with a T5 trans. can you do that, since you just said the T56 flywheel has more surface area, or would you need a T5 flywheel....

 

T5 / 305 starter will work with the T56. http://monte-list.com/html/images/ma...s/P1010066.JPG Or the LT1 starter (there are two; check price and core charge before you choose) or the C4 Vette starter without a support on the end of the pinion gear works.

The 4th gen F LT1 clutch disc hub does not fit in the T5 flywheel against the flywheel to crank bolts. If the C4 Vette pressure plate bolted to a T5 flywheel, you could use that clutch assy. since the hub is not sprung like the 4th Gen F disc hub, but a solid disc hub clutch is going to be a rougher drive.

Qualifier: I have an LT1 T56 (1995) and am using third gen T5 flywheel and clutch. But, I am running mechanical linkage AND it required sleeving the o.d. of the bearing retainer on the trans. to a larger o.d. and other little custom bits. Trust me, just buy the right flywheel.

 

and the LT1 is a 2 piece seal correct. so i'd need say a late 80's early 90's t5 flywheel. or would one work off of a 4th gen T5. I dont know what years the T5 came in.

 

An LT1/LT4 engine is effectively an 86+ 305/350 SBC at the back of the engine, including the 1pc rear main seal. 86+ SBC drivetrains bolt right up to it.

It's not worth it to try and use an LT1 flywheel with a T5; just get the T5 flywheel.