Im putting a 90 mustang motor into a 78 cobra and need some info on the flex plate. I have the original bell housing and flex plate but am worried about throwing the balance off on the 90 motor with the 78 plate. Any helpis greatly appreciated! Also, it is a C-4 going behind it all. I know there have been a ton of c4 swaps on fox bodies, but just cant find someone to pick brains