I had them with a blower and it was fine. Plus cobra guys usually build solid rears when they get them, and that would be your chance for 31-splines and 3.73's.
Hey man, A buddy of mine is definitely interested. His car is an 04 with about 29K on it. Said he'd do the swap for your set up plus 400 cash, and he'd take care of the labor to do the swaps. Just let me know if your interested and I'll get you his # so yall can work out the details.
P.S. I think I know you from the BMC, I recognise the car anyway.