For that question you may have better luck asking here
http://www.torinocobra.com/forum/index.php
or here
http://www.fordmuscleforums.com/torino-pages/
On my unmodified 69, 245 45 17 and 285 40 17 fit just barely. 8" 4.5" bs front and 10" 5.75" bs rear.