That's makes them even more attractive to me. Have the guides checked,pushrod clearance,clean up the valves and seats. Gasket match which is easily done and you would have a good set of heads. Easily capable 500 plus hp. I've been seriously considering getting a pair to have on hand. A pair of Eddy heads 1120 bucks. 440 Source 1000 pr, Trick Flows.. much better head 2100 pr.