Guys! Where have I been on this! I'm in Va Beach and totally missed this thread. I have a WS6 Trans AM that I auto-x (right at your back door at RIR) I'm building a 67 RS that hopefully will outrun the T/A. I consistantly beat porshes, BMW and Mercades Benzs so it can be done! My T/A is stock with the LS1 and a 6Sp, and no chassis mods. Check out this site for tons of F-Body Road Racing info
http://www.frrax.com/rrforum/ Send me a PM and I'll be glad to help you with the planning for your build and I do work for Beer! The suggestion about Nascar or Circle track suspenstion parts is right on time... I'd start there, yeah, and loose the boat anchor engine, you won't like the push at 100+ MPH on a real road course. I'm running my T/A at VIR in Danville in March.