bad news about block

I am not a machinist so I don't know if there really is a way. But from my experiences from dealing with them I would think a knowledgable machinist would know if it was going to fly or not. I would think if it was going to be questionable he would done what he could have to make sure that those cylinders would bore out good. Or at the very least work with you on the price. Like GTS340 said his reputation is everything especially if they do race motors of any kind. If you have to, use it against him.