Did that motor even turn over? I've seen some bad engines, but that one looks like every moving part was froze up! Yikes!
Sounds like theives in your neck of the woods have unusual tastes, a flatbed? Rocker arm?? Carb bolts??? Oil drain plug???? Sounds like that thief had some problems in the head! You might check the suspension and such to make sure he didn't take the nuts/bolts out of any of that!
Sam