I went back out and cleaned the head off good and it does appear the casting number was ground off. Because there are a couple castings for the valve guides have the edges distorted on them from what looks like a grinder. I am attaching a couple pics and the only other markings I can find is a 5-20-L casting code on the outside. Also found what appears to be a hand stamped number on the back carb side of the #4 cylinder. I took a pic but it is hard to see. The hand stamped number is 3574. I guess since the casting codes are gone I will never know what head it is. I also included a pic of the way the governor was set up. I got new stop screws in it and a new spring. I will fire it up tomorrow and see what other adjustments needs to be made, because I think someone has messed with the linkage running inside the governor as well.
Also disregard the way the oil looks, the flash made it come out that way. You can see in the first pic that it is fine.
Also disregard the way the oil looks, the flash made it come out that way. You can see in the first pic that it is fine.
