Jefferson 500 Kas Kastner GT6 Charlie Dolan 2015 

What suspension work does one need to do in order to get a gt6 to handle this well?

First time I've seen this video. I believe I was there that year, remember a small shunt when I lost my brakes at the downhill sharp left T3?, may have missed this this particular race. Boy, thats some tight box you have there! Quaife CR in a TR6 case? I tried that set up but could never get it to perform like that! My car just blew past all those TR's on the front straight, just like you did. 😎