466 one is for all engines cept 454 and sb400 and is for 11 and 12" clutch, any tranny and any year after 55 cept 86-up
there iwl be date casting code on it like how you got the number off it like thta, it wil be sometihng like F38 or j178
good luck
[This message has been edited by Fast68Chevy (edited March 22, 2002).]
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