"Something tells me this may be the Bob Montana McKee MkV.  I recently saw the car at the Del Mar Concours  but I think it now has a multi-speed transaxle. I know it now has a Plymouth (?) Hemi in it. I remember seeing it at Riverside (with the Hemi) but can’t remember if it started life with a smaller motor. I believe the current owner lives in San Diego county. Hopefully he is a “Tam’s Fan”!!!"
 

(1-7-12   From Mark Ellis:

"I think that's Jim Hall working on one of his Chaparrals."
 

(6-15-12)   From Bob Immler:

"I vote for a McKee.

I'm not sure what it is, but it's not a Chaparral. 

There were Chaparrals with aluminum monocoques, but they were painted, never polished. There is what appears to be a radiator overflow tank. Chaparral always used the ones from a Corvette."