I bought 15x10's with 4.5" back spacing with 275/60/15 ET Street Radials and I had to trim the wheel well lip off and roll it over so they didn't rub.

1968 Roadrunner 383 auto .060 KB 400 domed pistons, Stealth heads, Torker intake, Holley 830, Lunati Voodoo cam 276/284, .513/.533, TCI 3500, 3.91 gears, all ARP fasteners,