Like the title says...
THE EXHAUST THREADS ARE STRIPPED OUT as shown.
I also heard a that this might be a clone made by 1977. I ALSO head that you definitely only want to run ONLY the top ring, the bottom one will inevitably snap off due to a design flaw. I learned this after I bought the bottom ring for it. Ran the kit with both rings for about 2 minutes before installing a Polini kit, so i know it works.
I’ll take literally anything for it. A bag of jelly beans. Cost of shipping. Just don’t want it lying around. I have a needle bearing and wrist pin clips as well to go with.
