My Wheel Vintiques have been on my '72 Swinger for 15 years now. Never an issue with them. All are 5 on 4 bp, 15x8 on the rear, 14x6 on the front. With the 4 5/8" backspace on the 15x8s 245-60s with about 40 lbs of air in the air shocks. It's 40 years old, the springs are/were sacked, what can I say? It was my daughter's high school hot rod. Ya know, with headers and turbo mufflers and that little bitty 2 barrel on the 318, sure made that cam sound lumpy. New plans for the Dart now. This forum has answered many questions already. Thanks to all who contribute.