if you rebuild your engine and reuse your pistons and dont replace
the sleves then measurements and honeing are very important. You will
check these measurements to determine if you need to buy over sized
rings.... but if you replace the sleves, replace the pistons with new pistons
then you will also be able to use the standard rings. You will have brought the engine back to the factory spec of a new engine....

You will have to measure the connecting bearings. Since you will have a new piston and an old crank shaft...i dont know what the price of a new crank is.

becareful rebuilding can be done at any level you desire. You can polish and balance and manga flux, and blue print and X ray, and do all kinds of fancy things. And for a race car these may be good things... But on a basic old diesel you probably just need new rings, a head gasket, and new valve guides. All the rest of this stuff is gravy... So just how much gravy do you want... If the car is special and you want the full gravy boat then go get yourself a metric motor.... they probably do the best work...

I have 267k miles.. and my plan is just a new head gasket and oversized rings, on the first rebuild, at 300k... on the second rebuild about 400k I will replace the sleves... and on the third rebuild about 500k I will spring for new pistons...So to each his own....