I have done minor machine work...making repair parts, shafts mainly, for 30 years. I have a nice lathe, mill, surface grinder, drill press, heat treat oven, sand blast cabinet, variable speed belt grinder, tig welder, torch set-up.
I am a retired maintenance worker with a machine shop in the garage. I have not created an engine yet, but am entertaining the idea. I will be watching your projects for ideas.