Millions of stovebolt engines have run for decades with .060" and .080" overbores. When boring a block for a sleeve, it's common to bore the cylinder 3/16"(0.1875") or 1/4"(0.250") oversize without hitting water, but an overbore that size would not be suitable to run a piston in. I have sleeved hundreds of cylinders without any issues, so it's possible to salvage a worn or damaged block as long as there are no cracks or holes in the cylinder wall in the top or bottom 1/2" to 3/4" of the cylinder.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!