Check the latest issue of I think eithe Car Craft, or Hot Rod... they have a whole article on this for the 1st, 2nd, 3rd & 4th gen F-Bodies. Specs from 14" to I think 18"
Back spacing, tire etc...

If you don't find it, let me know and I can send you the info and or scan it and send it!

Brett - 67 Drop Top 455 (15" Rally II's)


[/B][/QUOTE]