I do have the old heads, but am looking into others. I have a line on some bare EQ Magnum heads, the B modle which are set up for LA intakes. I was think of using the valves from my old heads and the Hughes 1199 spring kit. Looking at that route by the time I get done, I could pickup a variation off the net, which would need to be "checked" or wait for the Black Friday sale and get some direct from SM. Are they save enough to run "out of the box" or do they need to be "cleaned/checked" too?