I just checked the bores in my T35. They are 2.427 inches. That's .033 over stock. Presumably it was a 30 thou overbore with 3 thou wear. Alwyn mentions a bore and resleeve. Does that mean the cylinders had already been taken out to the max. at 50 thou, and needed to be resleeved and bored, in order to bring it back to stock? If your cylinders are only at stock I would hope 10, 20 or 30 thou overbore wouldn't condemn the barrels, nor require a resleeve.