I have only found them complete w/valves and springs. I have found them in a few places, first for $1,099.00 at WPParts.com - Edelbrock/Lingenfelter LS1 61969 Cylinder Head
and for 1185.61 at http://www.gilbertchevy.com/viewEdel...LINDER%20HEADS
Have fun! Also I think that is just for one head, so be carefull on what you try and buy.