I plan on 7s with 4 1/2" backspacing on the front and 8s on the rear with 4.625" backspacing. I know this is a popular subject and want to be as close as possible. They will go on a 69 Z/28 with 34,000 original miles so i dont want any modifications. I get tired of being bone stock all the time and want something different. but from time to time put the originals back on. any sugestions, comments or ideas will be greatly appreciated.