1960-1966 Clam shells and Tonneau Covers

[Hantke]

So right now I have a 1966 C20, im debating between using either a clam shell (some people call them camper shells) or a tonneau cover styles bed cover. The tonneau would be great as i can put a tool box under it, but since the tailgate doesn't lock i would prefer a tri-fold cover (I can make my own if needed). On the other hand, I'm going to use this truck for construction work, and a clam shell would be awesome! but i've seen almost no pictures with them, and out of the few I have seen, most are odd.
Anyways, post some pictures and show off your truck!