Hey Samy!
I don't give out the specs to my wheels due to all the variation with suspension parts, fender clearance, leaf spring location etc. Even with E-bodies there is great variances between the Cuda vs Chally, any car built in the 70's for that matter.

The specs on my wheels really only fit my setup with 295 tires and also need a few millimeters more to get the "perfect" offsets for 315's. I actually found out that on hard cornering the 315's just barely rubs on the rear leaf springs. I'm going to need to use 3mm spacers as well as rolling the rear fenders for these current wheels. My next setup of wheels will have corrected offsets for 315's R-comps.

If I gave out my specs it doesnt really help anybody and I wouldn't want to get blamed for not fitting their car. One has to get a ruler and measure for their specific application. As always I will help you or anyone else with the correct sized wheels to get the maximum amount of tire underneath.