Wish I had a picture of the one engine we found back in the early 70's Was made up of 2 chevy 6 cylinder units bolted similar to the engine shown. There was no heads and had pistons opposed. The gentleman tried to explain how he was trying to get it to run. IIRC it had some sort of updraft carb on it.

Of course then we passed on Ardun head for flatheads for $200. and early hemis to run SBC or Fords or if you got a chance ran a big block in your hot rod.