I’ve seen the ford 9 inch size charts that list a 67 cougar having both a 59.25" and 60" (from axel flange) can 67/68 cougars use a 60" rear anyone know for sure/seen it?
A 60" rear axle would either need special offset rims or cutting the wheel wells for clearance. The originals measure 59.25" - anyone who says otherwise has never measured one.
Used to be you could order offset rims. It’s hard these days.
I’m running Legendary 16x8" wheels with 4.5" backspacing and 225/50r16 Falken tires on my original 8" rear end. There is so much room in the rear that I have thought about adding wheel spacers. Depending on the wheel and tire choice you buy I would think a 60" rear end would go in fine. I can measure my overall width when I’m home but that won’t be for a few weeks.