[Schonyenko2]

If I remember correctly, and I may not, there was some speculation that the motor was to be a built 400 small blk for a 70. There are pictures of a 70 something Camaro with supposed Yenko heritage that has a lot of what you described. Maybe somebody will post one of those pics. I've only see it. Don't have the pic. I think a couple of members here have it. It may have been a prototype. One of the deuce prototypes probably had a 6cyl in it. Never say never.