Good Chevy buddy of mine bought a nice engine from Ohio Crankshaft and the engine destroyed itself between the water box and the starting line after about 50 passes (or less). The piston was GONE, destroyed. And it was a well known piston manufacture. They took the engine apart and gave him an 8 page report on what happened. Failure to properly clean block and engine parts while assembling engine. No thanks, I'll do my own.