65 Barracuda, best width and backspacing?

I'm running 14 x 6 on the front with 4 inch back space running 205/70/14 [was running 235/60/14s rubbed at full lock] rear running 14 x 7 with 4 1/4 back space with 245/60/14s plus this car is lowered 2 1/2 front and 3 1/2 rear with no rubbing.