Will 255/70 fit on a 72 dart

i have them on my 68 cuda with 8 1/2 wide with 4 1/2 bs and off set ss springs. they may rub on the inside wheel well but the tire is so big that it is very close to the front qtr panel .if you try and move the rear back for clearance then your shocks may it your gas tank.at least for me. I like the look of the 70 series tire it fills the wheel well. i was thinking of going with a narrow 235/70 with a smaller diameter tire to get the clearance