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

I have run as high as 185 on the seat and IIRC it was 500 over the nose.

You can do it but you MUST run a 20w50 oil and you need at least 80 psi of oil pressure at WOT.

Anyone who says their lifters can’t use a 20w50 oil needs to learn the truth. If the lifter can’t use 20w50 the lifter is junk.