V8, and GS-IIb, which used a lightweight chassis and reportedly achieved  at Jim Hall's Rattlesnake Raceway test track. The GS-II was styled again by Larry Shinoda.
V8, and GS-IIb, which employed a lightweight structure and showed remarkable results at Jim Hall's Rattlesnake Raceway testing ground. The GS-II was reimagined by Larry Shinoda.