True the first blocks were not very good but those were like 5-6 years ago, Shiloh makes he's work and look what all he's done, showed him some pics of mine and even he said it looked a done better then his. Firing mine up today for the first time. I did have to notch the oil feed holes on the crank to align to the bearing but not that bad. I hear the new machine place Kent uses is a lot better then the old place like where I got mine from, but I was in so. Cal and had QMP do my machine work and check it all out, they know these blocks.