B body 8 3/4 in an A body

ESP47 said
Thanks guys, I did some measuring tonight and my BBP wheels have 3.5" backspacing. Basically they will fit in there without any room to move. Which is obviously a no go. I think 5" backspacing is what you need if you're going to use the 65-67 B rear on a Barracuda.

Do you guys know what the minimum gap should be between the tire and wheel well?

Theres no real minimum its up to how comfotable you are with how close it is. I would want at least 1/4 inch +, but thats me. If you really get on and the body flexes it will rub. There was a article in the mopar muscle mag a while back and they put a b body rear in a 68 dart and moved perches in and with the right offset it worked great