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Well 143 10 1/2" for the 383 A body. Other wise you are right.

I was just giving what I had being they weren't sure what it was.



Incorrect , the 10.5 clutch setup were used by the factory on 130 tooth flywheel , only SOME aftermarket flywheels had the 10.5 clutch cover pattern on a 143 tooth wheel. The 383 A body used a bellhousing that would only accomadate a 130 tooth flywheel .

yup. like I said...