235 70 15 rear early abody
Just to add.When I bought my 65 Barracuda it had the B body front suspension and a Ford 9 inch in the rear. It had a 383 and 727 too. Replaced the Ford 9 inch with a 7.25 LBP 3.23 Sure Grip from a 1974 Dart Swinger 318 904 car.
I was bucks down and needed to drive my Barracuda for work. The only tires and rims I had on hand was two 235/75 15's from my Dodge D100. They fit on the rear OK. They would hit the fender on front. But that 235/75 15 is almost 1 inch taller than a 235/70 15.
I use TacomaWorld's tire size caculator to find sizes that match up.
235/70-R15 vs 235/75-R15 Tire Comparison - Tire Size Calculator | Tacoma World