Sorry Greg [fairlane500], no idea of price, however, all 21 stud specific speed gear, ie, heads, is pricey, including Orosco's repops. However, I have a pair of Orosco's E.M. 21 stud heads on my motor, and they work very well. Beauty with function. Admittedly I have reworked the combustion chambers to suit my motor, but in my opinion, the best feature of those particular heads is the relocated spark plug location. Clear of both valves, it allows the use of extended reach plugs [although I'm not running that particular style], and therefore higher lift camshaft. One of the best things I have done for that motor. Brian