Wayne, I hate to say it, but that kind of break in, espeically the lapping of the piston to the liner is really bad for ABC engines like the OS LA.

On an ABC engine, you want as tight of a fit as possible between the piston and liner at TDC, you want a pinch, interference fit, not a slip fit. When the engine heats up, the liner expands faster than the piston, creating the proper fit. If the fit is already loose, when the liner expands, you loose power.