Dave don't forget to check out the new Blue Thunder heads as well. I've heard some having problems with the Dove's sealing head gaskets. I think the BT heads are around $1800 for the pair complete. I think the Shelby heads still out flow the BT. And the BT outflow the Edels in stock trim. Keith Craft Racing would be a good contact as they use all three on a regular basis and offer them in "Staged" versions. The only thing I know about the Dove heads is they are cast in the Ford molds. They don't make them often and take a long time to get after ordering form what I hear. G.