Well guys I recently ran across one of these engines. A gentleman, local passed away and the property is being sorted out. I recently purchased some parts and seen this engine. 477 is what I was told it is. Not sure how to identify properly. If anyone interested drop me a pm. He had some other cool parts from back in the day like f600 trucks and other related type stuff. Stuff I'm not familar with but somebody might be interested in. The 477 is complete and been garage kept is about all I know. Had some carbs/oem laying around also. Intersting stuff that I've never seen before and just a intesting stroll through history. drop me a PM.