i know 2 cars that run in the same class, and one engine was machined by best machine, and the other has lots more cash poured into it was machined by automotive machine, im not at liberty to say more details than this, but the best machine engine has been together for 3 years, turns more rpm, made 20 less hp with at least 2 points less compression, and has way less money spent on it. not bagging either shop, but i'll go with best machine based on the ability to get great packages together that last.