Hey guys...I've got a 71'Chevelle project that I'm looking to buy some wheels for.I've been looking on E-bay for some Centerline Autodrags.I want to get 15x7 and 15x8.5, but I don't know what backspace I should be looking for.What do you guys think?

I would like to know if someone is running those 15 by 8.5s on a 70 to 72.