Now that I have rounded up the proper Y9 for my 76, the X7 for my wifes 78, and a 75 T/A (forget the code) for my daughters 75, I find my self no longer in need of the ZK that came with the shipment of my 76 (they guy had it and trrough it in because the original was gone). I have had the machine work done. It was cleaned, new freeze plugs, new cam brgs, and bored 30 over. The work was done by Engine House in Phoenix. It is in Phoenix Az. I will take offers with local pickup or buyer arranged shipping. I have over $400 in the parts and machine work alone and will include the original 6S heads but they need reworked. Taking offers starting at $250.