I have a 1972 340 block for sale. Block is 0.060” over and has some grooves in two cylinders as seen in the pictures. Based on the fact there is no groove at the top of the cylinders and everything else in the motor appeared to be nearly new, I’m thinking it was rebuilt and something was amiss. The top ring on nearly every piston was broken when I disassembled it. So, guessing it will need a couple sleeves. It has all the main caps , but otherwise a bare block. Asking $200 OBO. PM me if interested. Located in West Michigan. 49425
