I dropped the block off today at a truly trustworthy machine shop. Initially, I was hoping to just have it cleaned, reamed, and honed for 250 and then I would do the rest. However, the mechanic said there was a little wear on the cylinder walls and recommended that he bore it out and replace the pistons (oversized). He can get the pistons for $480. He did say that I could go with my initial plan and it might be fine but why take the chance. There was some scouring on the pistons and the oil rings were pretty gummed up. Anyways, I'm wondering what I should do, and where I could get cheaper pistons if possible?