Will 15 X 10 wheels fit the rear?

Mullinax, Do you have large bolt patern on your Barracuda or is it still small bolt patern ?

A 275-60-15 is 28" tall and 11.3" wide with a 9" section width. They would be fine on a 8" to 10" rim but I think 8.5"-9 would be best. If you move the springs with the offset hangers you can go about 5" of backspacing. Mine were 4-7/8" wich was perfect. If you dont move the springs 4.5" may be real close to the springs pack so you may need a small spacer.