I mini tubbed it and and sectioned the wheel well lip 1.5" forward when I replaced the quarters. Springs relocated. Street tires are 31 x 16.5 M/T sportsman pro's on 15 x 12", 7.75 backspace custom Cragars. 31 x 13 M/T ET Drag slicks on 15 x 12, 7.5BS Welds. I bought the Welds used with the Hoosier 29.5 X 12 slicks and ran them for a weekend. Car ran the same 9.85 @ 136mph with both size slicks but it looks so much meaner with the 31 x 13's