Hey guys.. Sorry to bump this Soo many years later, but I'm still trying to figure out what this engine is.. The project was put on hold for a while due to financial reasons, but after some guidance from a mechanic friend, I was told about a stamped code number on the block that I didn't see due to dirt on the block.. It reads "CEB1330".. Along with the casting #3970010 does this help shed any light on what I might have here!?