Ok one more question, I was able to aquire a .020 over piston, had the cylinder bored .020 over so, cylinder issue should be resolved. However, looking at the fly wheel and crank mating surfaces, the guy used lock-tite red on it, as well as the threads, when he torqued down the flywheel nut. Replacing the crank and flywheel was part of his repair work. Looking at the keyway, it looks like there a gap on the back side of the keyway trench.
View attachment 290209
Is this something that can be repaired? Weld on some metal and smooth out the surface?