Backspacing 20" Wheels

[70rs/ss]

The back space issue comes from interferance with the ball joint, but he is talking 20's so it will place the tire/wheel far from the tierod. Most of these trucks like 3.5-4" of backspace, if nothing else steal em on ebay, try em and if they do not fit re-ebay them or just get a 1" spacer to put the wheel at 4" of backspace. Billet spacers are way strong and an inch is not an issue (2" and up I'd be concerned) Good Luck!!