Originally Posted by Alabamaranger
Get a micrometer and measure the bore and see what the size is under the ridge. That will tell you if it needs to be bored or not.
If you can feel
it, you're going to have to bore
You can strip out a ridge about .001-.002" (one side) height with 120-gr honing stones (I've done it a few times,) but it's hard to feel something like that unless you're got practise.
Typically, if you can feel it with your fingernail, you're looking at .003"-.005" on one side (total .006"-.010" defect,) and probably a bit more than that.
Typical overbores? You can find rings & pistons (yes, you'll need both to do a proper job) in +0.030" easily, with +0.010" being uncommon (but sometimes
available, depending on application.)
Hone & re-ring? Perhaps - but I wouldn't count on it lasting more than it would take to source another block or pile up nickels to do the job right (call it six months at the outside...)