I'm wondering what your running as a rear end width in an e-body with stock wheel wells. I plan to run Cass's inboard spring kit but I'm cutting down a rearend and thought maybe someone had a recipe I could follow. I tried to run a set of MT et street s/s 275/60/15's on a stock length rearend with 15x8 rims with a 4.5 bs and they rubbed really bad. I don't think a 5.5 bs would help the issue. So I need some help!