wheel help...backspace ect....

[72V21V25]

Ive decided to go with some old school Cragar S/S rims on the 72 GTX.....Im sticking to that Day 2 look.. I would like to run 15x10 inch in the back and 15x7 or8 in the front...What backspace would keep the 15x10s under the wheel wells without hitting anything>>????? Or is a 15x8 the only way to achieve this...im thinking 275-60/15s for tires out back...Help is badly needed on this ...Thanks...

[bruce]

Our B-bodys are pretty happy with a 4.5" backspace. That's what I've got on the TTs on my Runner. 17 x 8" on the rear and 17 x 7" on the front.