I`M ABOUT TO PURCHASE A NEW SET OF CORVETTE RALLYS FOR MY 69 C/10 JUST WONDERING WHAT BACK SPACING WOULD FIT I WANT TO GO WITH 15"X7" FOR THE FRONT 16"X10" FOR THE BACK MY TRUCK IS LOWERD 6" FRONT 7"BACK WITH DISC BRAKES ON THE FRONT      

15x7 work with 3-3.5-inches of backspacing
if you've got a stock '69 vintage rear end then you'll probably run into rubbing problems with the inside wheel tub or outer fender lip if the truck is lowered.

we recommend going to a 9-inch wide wheel with at least 5-inches of backspacing if you want it to tuck in the wheelwell properly.

if you have a '70 model or later rear end, make sure to go 5.5-inches on the backspacing.