IJ. said:Mass: At a bare minimum it'll need honing so I'd be careful about this approach in case you end up building a rattle monster
(piston to bore needs to be quite tight with modern forged pistons and there's a chance you'll end up with too much clearence)
That's exactly what I'm thinking, which is why I think it's safe to just get the 20 over and bore it. I can't risk being a few thousands off when I just as easily could have gone bigger.