i have a 95 caprice classic with a lt1 and a built th400 . this car is for drag racing

it seems like the tranny will bolt right up but one bolt which should be fine but what do i do to make my tc work?..will it bolt right up the the flexplate?...or when i get the ls series motor i'll have to buy a aftermarket FP designed to be bolted to an non ls tranny....my tc has two bolt patterns on it.