I bought mine on ebay for 250.00 each bare. I added edelbrock valves PAC springs and comp lock and retainers. Had to heli ciol rocker stands and exhaust bolt holes. Did my own valve job and porting. Now I would just save and buy the trickflows. So I have about 1000.00 in them not counting my work and there not near equal to the trickflow. Listen to IQ52.