I have a complete all Aluminum 506 with motor sport A460 heads . It is an older 10 bolt block. I am looking to trade for a A460 block set up. I am flexiable so let me know what you have, if you have any questions please feel free to call or txt me @ 843-460-0268. Thanks; Jarrett. The block has been filled with block fill so no water runs through block. Will also consider selling and I will separate. I'm located in Charleston ,SC