340 Block Cost

I have the opportunity to buy a 340 block off a buddy. It needs a sleeve in cylinder 8 however. The goal is to machine & build this engine stroked to a 416. Any idea what the cost of the block should be if it needs a sleeve?

what are the current sizes of the other bores.
If standard $250+
If 30 over already: $150-$250 lower end would be a 71-73 model casting date.