WD40, that sounds right.

Right now I’m weighing my options. This was a pretty big setback and I’m trying not to let it get me down.
It seems to me the rebuilt head in the KW catalog is a “plug and play”.
There are also NOS heads available that I could rebuild myself.
Obviously if the head checks out, I’ll just put new gaskets on.

Making lemonade out of lemons I’m thinking of making this one as bulletproof as possible. I’ve read someplace that valves or valve seats suffer from the higher combustion temperatures of modern gasoline. I imagine there are remedies one can build into a head, harder valves or seats.