69 340 block...ready to build

If a sleeve is done rite it will never bother. Done wrong and they can be a nightmare. I see a sleeve in a 400sb chevy drop because no lip was left on the bottom. All I can say is im glad it was not one of my engines. YUK.... I have .030 over 340 in my car rite now with 1 sleeve and it has been running strong with no problems.