It looks physically interchangeable as a unit, but not sure what (if any) internal differences there may be. I know now from experience the heads are the same.....except for maybe missing sensor holes. I've purchased 3 or 4 forklift heads now and none have had all the sensor holes, but the bosses are there and they can be drilled and threaded.

The biggest concern I would have with the eBay engine (other than it likely being a Chinese reproduction), would be pistons. Forklifts don't need as much power, so I'm guessing the pistons may be lower compression and perhaps also heavier construction. Lower compression would reduce power and heavier construction would reduce RPM. Tim