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 found an 8"/205mm Diamond Core drilling machine '3980w' rig on VEVOR for $265.99, I will start with that and add bore head in place of the cement bit . Buy $50 bore head out of Harbor freight and figure out what to do next. Any constructive advice is always needed and gladfully accepted ...how about a good reasonably priced hone bit...test doing a hone before any bores.
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If you are dead set on doing this yourself, dont piece together a bunch of stuff and hope it will work. Just buy yourself a used boring bar and be done with it.