Rebuilt engine 318 Question

the mechanic i work with, i had him take it apart, so he did and took the pistons out and we saw some scoring and marking on where the two pistons blew

the rest were fine,but two of them had some damage on the inside of the block.

i tried having my uncle take it to his mechanic and since the block is in pieces (just the core) he was pretty much saying it would cost to much labor and would run me well past 2000

so i dont know as far as i see it ill probably buy off Rockauto and then send my core to them