Prototype R3-automatic, turquois/turquois. I Purchased around 1969. Former owner purchased from Vince Granetelli. Hot Rod Magazine R3 road test car. Originally used by Sherwood Egbert for a few weeks. Sent to Paxton Products for use as R3 prototype. Sold by Studebaker (had California MFG plates) to Vince Granatelli in 1965 and licensed as Studebaker sedan. Engine number RS1021 has extensively reworked heads, dual valve springs, R3 cam and other changes. Engine frame mounts were re-worked to get more clearance for R3 pressure chamber (Factory cars had body shimmed up from frame to get clearance). Per recent conversation with Vince Granatelli, used for acceleration testing.