I run stock 87 M body 15x7" steelies, want to say they are 4.5" BS, but might be off on that. This is in a 65 Cuda.
later A bodies have a wider track mostly because they widened the front end on these cars, adding discs widened it more.
i believe the M body wheels are 4 1/4"bs. i used a couple of those as mock up on a 72 duster, and with the chosen tire size it was close. then the owner used a 4"bs wheel, and it was a tick closer on the duster, but "just" cleared. on the 64-66 cars, wasn't the original wheel bs something like around 3-3 1/2" ?
