Hi there
i have a 73 Mach 1 with 8 inch rims on the rear with 7 inch on the front. Both are 15 inch wheels.
The front tyres are 235/60 R15 Bf Goodrich which sit well while the rears are 255/60 R15s BFs which don’t.
the profiles or sidewalls make the tyres look too big, too chunky....