I recently talked to Patrick Dykes in Arizona about the .080 bore business.Patrick has his opinions but he has seen a lot.He says it was a common overbore years ago with stock after market pistons,no problem.The machine shop thermo cleaned this block then took a good look through the various core plugs and holes to look for excessive cylinder wall corrosion before boring.Sonic testing will reveal wall thickness to a certain degree but a small pits of serious corrosion can go undetected.
