That is a recreation of Ed Roth's (of Rat Fink fame) "Mysterion".
The original had two 1963 390ci engines and a C-6 brand new from Ford.
The two big blocks were so heavy that the frame kept on cracking so Ed sold the car. It passed through several owners and was eventually parted out and scattered to the winds.
From what I've read, a GM die maker by the name of Dave Shuten built this painstaking recreation.
- Phillip