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

Sorry Steve this f...ckup soft ware made me delete some of yrou post ,at the end of the paragraph.
No worries, to bad, I couldn't have you talk to the top machinist I knew at the shop, guy was brilliant. He made things we were in awe with. The shop he left to come work with us, his old boss was devastated
He's the guy who fabricated a boring setup to cut a the bearing that the prop shaft goes through
It was a inside boring machine scratch built, really something to see
Nice guy too, very humble and approachable