John, I think you ran the casting numbers when i posted this on another site and said the engine was a super. I also had one of my friends who knows the olivers look at it and said it is a super also. You can see where the tag is supposed to be, but it is not there under the dash. I'm just going to have to pull the engine so i can clean it up and see if i can call floyd museum to track down the serial number, thanks