Im looking to find out what backspace will work on my 83 regal. I want to go with a 15x10. I have searched alot and have come up with alot of differnt answers. Some say 3.5 bs and others say 4.0 bs?? The tire size I want to go with is 28x10.5. If I need to notch my frame thats fine. My fenders are rolled already. Thanks!
