My guess would be all the crap would be bolted up inside the motor :?
A buddy of mine, who's bolted together a few hi-po motors in his day, commented on the nice job they did on mine. Except for the dirt, the machine work and parts look very good (for the money....)
Like the old saying goes, you get what you pay for. This particular block looks to be a notch or two above that generalization.