You don't have to get an "overhaul kit" if it has parts you don't want.

However if you get new standard size pistons and ring, you will need new liners so they will fit the new pistons. You could keep the liners you have if you get oversized pistons and rings, but you will have to take the block to a machine shop to get the piston sleeves bored and honed.

But since you have to take the block in to get the sleeves removed and the new ones pressed in, give him the new pistons and they will bore/hone as needed for the new ones.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)