shake401k

Have a 3rd gen firebird, just upgraded the rear to a 4th gen disc 3.42 posi. i knew this rear was longer from the sticky thread here talking about 10 bolts. however i cant find a "end all" answer for wheel dimensions and fitting the tallest, widest set up i can manage without serious tubbing.

Before the swap i was running 10.5x29.5 firestones on a 15" rim (not sure the offset) with minimal rub. i say minimal but they wouldnt fit at all without a little metal persuasion, also minimal. overall fitment was good.

the caliper to rim clearance on this swap is very small so i know ill be needing to go up a rim size. basically my question is what is the tallest widest tire i can run ? and what is the offset i should be looking at ?

cosmick

You can run the same tires as before, just order new wheels with more backspacing. I forget if the later axle is 1.5" wider per side, or 2", so measure both your axles, half the difference is your extra backspacing

shake401k

Thank You ! i will be ordering soon, i can always return the wheel package if fit is slightly off.