I'm being told that the LS1 T56 clutch and flywheel won't work mating to my 350 Rocket.

I read that '68-'90 all these olds engines used the same flywheel and clutch
68-90 (260,307,350,400,403,455) < 166 teeth....

Is this true ?
I'm looking for inexpensive but not junk solution.
I'm currently looking at a 68-70 442 7.5L clutch kit.....I'm assuming it will work ??

 

Because the bolt pattern on the back of the cranks are not the same. Olds is one bolt pattern and chebbie is another. Regardless of diameter and number of teeth.

Unless you get a machine shop to weld and custom drill you the correct flywheel pattern and rebalance the wheel.

http://www.catpep.com/searchengine/s...&enginetype=15

 

Correct. All 68-90 Olds motors use the same flywheel for manual trans applications. There are two clutch sizes, 10.5" and 11", but most Olds flywheels are drilled for both.