Does that mean it didn't have the valves in the head when they installed it?
Valves are installed from the bottom side of the head. if for some reason they didn't install valves when they reattached the head, they are some of the biggest noobs ever.
If it was just valve springs/retainers and the cam/cover, you should be fine.
There are 10 head bolts that connect the head to the block. Then you've just got your timing belt, coolant hoses, etc.