FYI....the IROC 3rd generation Camaro diffs, posi/discs are Borg Australian-made and if you need the axle seals you'll run into some real problems. Local GM dealers couldn't even get them. I've found it tough to find the Camaro diffs in 3.73 R&P's. The 3.42 works okay with the AD chassis and .72 T5 and I'm running 15x8" rims with 4" of backspacing in the 5 on 4-3/4" bolt pattern with 255/70/15's on the rear. Would opt for 235/70/15's all the way around on 15x7 rims with 3-5/8" BS if I had to do it again.
On the front with the disc conversion, the 15x8 will work....with 3/4" clearance from the upgraded tie rod ends.....I'm running a 15X7 with 4" BS w/235/70/15 on the front with good centering in the wheel well and plenty of clearance from the upgraded tie rod end.
My rationale for running the Camaro drum diffs is that they are newer with lower mileage and I've yet to find one that needed any "fixing." Most can be had for $100.00 with the emergency brake cables, sway bar, as well as the driveshaft.
Dave
