If you want to run it, I would just put some in the gas and run it that way. It will slowly clean over time. I occasionally used Marvel Mystery Oil in the gas on my Kohler Command 25hp Twin. I maybe did 5 tank fulls with the MMO added to the fuel.
At around 400 hours, one of the head gaskets went, which is a fairly common problem on this engine. I did both sides, and everything looked spotless. I was pretty impressed with how clean the engine was. That same engine is now getting close to 600 hours and runs great. I would add some to the gas tank if you want but otherwise I wouldn't bother.