It depends ENTIRELY on the rearend width you have, how much minitub, and where and what kind of springs you have. We have NO way of knowing. You have to measure on your car.
On my barracuda with the springs moved, and a stock B width rear, I use 10 1/2 centerlines with 7 1/4 backspace
The 12s that I have are used with small tires (315/65x15 et street pro's) and were custom ordered for the least backspace I could get, 3 1/2". They are used on a very narrow little car with a very narrowed rearend (with very big tubbs.)
