The only difference in the 934 and a half clone and the 993 GT2 Evo clone if I built them would be the bodywork. Mechanically they would be identical. I wouldn't be going for authenticity since my goal would not be vintage racing. I would build a turbo car able to run at the top levels of regional PBOC, PCA, SCCA, and NASA racing. And no I won't track the RS, probably will pick it up in a trailer to bring it home.