Turn a small drill press into a Bore/ Hone. Bolt it to the top of your engine block & do your own machining .

Jessearent said

I would be happy with just being able to HONE a 0.030" .010" over to .040" myself at home. I don't think this is a rabbit hole.

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The machine shops rigid hone a few thousands of an inch for a final bore size. You are way over your head here. You either need the services of a machine shop or you need to go to school to learn how to do it properly.