I know the 312 ECZ-6015C blocks are very difficult to find in good, uncracked, usable condition but thought I would ask if anyone has one for sale.  I finished restoration of my father's supercharged Custom last summer and used the only good 312 block that I could find, a B9AE block.  I had five ECZ 312 blocks but all were cracked at the main bearings.  Correctness of the car is very important to me so, if anyone has or knows of a block for sale that has passed a magnaflux test please let me know by a PM.  Thanks, Randy