first thing would is check ALL tha holes for steel.. needs ta be done if ya plan on a re-ring with tha rest of tha "fix".. should be done anyway 'cause ya gotta take it all tha way down ta fix tha one bad hole no mater what.. reason being tha chrome uses different rings than steel.. check 'em with a magnet if ya can't tell by lookin'..
tha steel may be able ta be bored and not need replacin'... you can mix different size pistons in any V6 without a problem but... my own preference is no larger than 15 over with tha efi motors.. lotsa folks run bigger but I don't trust tha ecu's factory fuel curves!.. there is a reason Merc doesn't offer anything larger tha 15 over for tha efi motor..
main thing ya GOTTA HAVE is tha machinist... his work will make or brake tha fix.. automotive is generally a no-no......
and yes, it can be re-sleeve, bored and honed back to standard with any if necessary....
another thing is cost.. a good rebuild ain't cheap when done right which you need ta consider with tha age of that motor....a patch is just that.. a patch................jmo
