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Getting a 1981 buick regal with a 5.3 in it already. The guy is throwing in a 8.5 rear end. What do I need to do to put this in the regal with a 700r4?? Also how to build the rear end to handle around 600hp/tq with it mostly on the street. With the occasional launch at a drag strip but only with street legal slicks at the most. This next one is kind of a bonus if anyone can anwser it but the car is in the middle of a core3 c5 brake swap so just curious if anyone has done this and what wheels will fit and how much tire will fit underneath it with it. Thank you in advance.