Line boring........
vatting........

How much would one expect to pay for the above on a Duramax?

Line boring is the process done to the block and main caps to make sure that the bores are in a square to each other and in a straight line.

Vatting is usually just putting the parts through a hot solvent wash machine

that's what I though, thanks!

You wouldn't believe the junk that comes out of an engine block after they clean them and cook them. :ThrowUp: