That's outstanding, thank you much. I also found a site for HP engines and I may/or may not be able to get a muffler for the engine. I'm not sure what type of rings this engine had but I will give the HP people a call and find out. They state that almost none of the parts of the later engines will fit this one but they do have a few. I may end up selling this one to a collector. It would be a shame to run it and and lower the collector value for someone. Still, as a pilot I love to fool with the old stuff. I bought a lot of old stuff but it is all brand new and never used. I'm testing out an old charger right now and it seems to work perfectly. It's better then my favorite old ACE charger. This was a pretty good pick.