I have a Z6 head that was rebuilt ported and decked 40 thousanths i never put the head on after i bought it...im kinda strapped for cash...the head has new valve guides, retainer, and some new valves...the machine shop changed that valves they thought needed to be most were in very good shape...the head is fully assmebled...with a cam...stock cam...all the head needs it the valves to be set and its ready for install im asking 300 for it...let me know i might be give a little on the price or ill do it for trade for some parts...