Interesting IPCO replacement block. Valve seats have not been cut and has long pushrods, possibly for overhead valve head.
Would be nice to have pics of the bottom end...
Counterbalanced crank it says. How many mains???
The IPCO blocks have been talked about a number of times in the past few years,
Interchangeable Parts Company, New York.
Ken in Texas
This same engine was for sale about 10 years ago. I tried to bid on it but the auction ended. I think the high bid was about $200 or so.