want to run 255/60/15 or 275/60/15 on the rear anybody know for sure what back spacing i need? going to get some custom made from rally america.
255-60-15 will fit with out issues. i used a 5" b.s. with my 17" wheels that use a 255-45-17 on my 65 skylark. i did try a pair of 275 60 15 on a wheel w/ 4.5. b.s. that were 8" wide and they just hit the wheel opening lip, there was about 1" space to the inner wheel well. they may have fit with a 5" b.s. wheel. i would get an 8" wide rim because a 255 or 275 will fit. good luck.
