I'm about ready to start doing a top-end on my '01 426. I have rebuild a few motors in the past, but this is my first hi-end 4 stroke, so I got a few questions as I prepare to make a cost estimate (for the wife's approval, of course). I'm going to replace the piston, rings, wrist pin, cam chain, valve seals and do a valve adjust (did I leave anything out?). When I open up the cylinder, if I find it scored, or out of spec, what is the common fix? Re-sleeve or bore out (and install an oversize piston, as in cars)? If a bore can be done, do they sell oversize pistons (I haven't seen any on the internet), and will a common machine shop do it? Cost estimate of a bore? Cost of re-sleeve? Thanks guys p.s. Any tricks, hints?