.003 is fine (but as stated, what pistons?). by measure i mean he should have mic'd the bores, and measure the taper in them (widths at the top,middle,and bottom of the cylinder bore). can't just measure the piston/wall clearance. a good hone job would fix that. he has no way of knowing wether a .060" overbore is OK without sonic testing. IMO he's just running through the motions and giving you the bill.