If I ever get rid of mine for a Gen 2 Trac, I'll probably go with the Scott Drake stuff. It's great quality stuff. Might even go with the actual Shelby-branded ones and build a sort of psuedo-Shelby Trac.
Too bad Ford/SVT/Shelby didn't do anything with the Gen 2 Trac. Could've been a real screamer, and would sell well with the Shelby name attached to it.