Have you considered 3 d metal printing. https://www.bing.com/videos/search?q=3D+Metal+Printing&ru=%2fvideos%2fsearch%3fq%3d3D%2bMetal%2bPrinting%26FORM%3dVDMHRS&view=detail&mid=7EC541175B2DF8DF52FA7EC541175B2DF8DF52FA&&FORM=VDRVRV
Spray WD40, or starter fluid in the engine compartment while running to see it the engine accelerates, Spray around the hoses and manifold. Don't use propane unless you know what you are doing.
Our local library has a laser etching printer that I am going to try and use for my MOON sill plates. https://glowforge.com/?utm_source=bing&utm_medium=cpc&utm_campaign=brand&source=bing&medium=cpc&campaign=Search-Brand_Prospecting-All-Hear-GP&adgroup=glowforge&keyword=glowforge&msclkid=46ab404088ae1d75f7871ea2a355c925
The only thing I do different is to take an old spark plug base and throw away the porcelain and put a small balloon over the base. Screw it into the #1 spark plug hole. Crank it over and the balloon will inflate on the compression stroke. I find it easier to watch a balloon then feel the compression with my finger. Follow Tinindians instructions.
As has been mentioned the best resource is the Durant Club. They have a supplier in the club magazine. As Bud said look at the Durant section on this forum.