I'm saying while you may cure an amount of distortion.. you're only simulating/creating some/a different type of the actual distortion that exists in a running motor. If you're spending the extra in hopes of a perfectly round cylinder bore.. you're getting screwed.
Check a cylinder with no mains torqued and no heads.. note it...pen mark the cyl where you measured and take 6 cross measurements.
Then bolt the head on and check it again, note all 6 points of reference.
Now toque the main caps, measure again anand note.
Now put take the caps off and stick a crank in and retorque..and check.
Now take and cook it all up to 220 degrees and take the measurements again.
Compare then all.
You find the roundest hole in any of them but the block by itself, cold/ temp it was homed at.
That's what I'm saying.