Howdy from NC - 71 Demon

the rear size will fit perfect. same size i have. not cutting or rear spring adj. the front i would go with 15*5. i have 15*7 bfg 235/60/15 in front and they rub rear corner of fender and r flush with the outside edge of fender. would like the tire to be inside of fender. if u like the size of the stock wheel (meaning the width of it, i believe it is smaller than a 7inch) thats the size i would go with but with a 15 rim. i like the look of a big fat tire in back and not to skinny in front.