$600 is just plain too much money for that core. Pistons are worthless, rods are worthless, crank will need to be ground 0.030 to get rid of that ding, although it is a forged crank. But who is building stock stroke 340s these days? Camshaft is worthless, timing set is worthless. What is left is the block. It needs cleaning in the worst way, then grind the dings smooth, then use dye penetrant testing to see if there are any cracks.

The block is worth $200. Everything else he could give back to the seller, they have no value as I mentioned above.

R.