66 Barracuda. How Big Can You go on Wheel/Tire Size??

It's pretty easy to get 235/60/15's. Move the springs with the offset shackles/hangers you can get 255's. My old Barracuda in my avatar was mini-tubbed and had 295/50/15. These cars don't really like any tire over 27" tall unless you move the axle back a little.

It does appear on these cars that the wheel doesn’t sit center to the quarter opening which would make it hard to stick a fairly big tire under a stock rear.