Quote Originally Posted by Greg Amy View Post

But, given that the only build difference between the classes is the restrictor and a little weight, run both classes and decide for yourself...
Well, not exactly, Greg. As you remember, allowable wheel size is 8.5" wide in ITR, (and it's 7" in ITS) so a different wheel/tire package is part of the winning package. And, of course, that could mean different springs, dampers and sway bars, etc.