i'm looking to put on a new set of wheels and tiers I want the biggestbaddestt set in the rear and I need to know what will fit like back spacing of the wheel and what is the biggest tier that will fit in a 72 sky lark. I thinkI'mm going to put some 15x5 up front it's my drag car and i want that look. is a 15x5 a good size wheel? I don't think I would want to go any smaller.