I ran a set of 295/60(or 50, can't remember)/15 BFG radials on my 69. They are mounted on a set of 15x8 Cragar draglights. They fit real tight on the inside of the wheelwells and had about an inch on the outside. I do run drag bags, but not for tire clearance. They are in the attic right now because the GOAT is under construction at the moment. I can get up there and measure the backspacing if you like.
PAWN SHOP FIND
RESTORATION IN 1980...
"You can have it all, my emipre of dirt. I will let you down, I will make you hurt"