I can get 4x PACER aftermarket rims that have an extended wheel (never knew what that was called, they stick out further) they are 15s that came from a 86 monte carlo and they've got 235-60-z15 on front and i think 275-60-z15 on the rear
i'm not really concerned with the tire size

will these bolt up to a 91-92 firebird?
4x rims from my uncle for $200 is a deal

edit: they are 15s and the stock is 16s, no way i'm going to downgrade tire size for some cool looking rims, 245/50/16 is perfect factory size, perhaps a bit bigger in the rear would be nice