Seat Belt and Door Lock Questions

[slamd58]

Hey guys, need your help. The new 72 I picked up last weekend has a hole and nut (that is pop riveted on top and bottom) for a shoulder harness. My top is a double wall. Was this factory? or did someone add it? I am somewhat concerned that the fiberglass top wouldn't give much support in a wreck. Your thoughts?

Second, the door locks won't stay locked when I close the door. I lock the door, close it, then the damn lock comes back up. Even when I use the key to lock it, when I push the outside door handle, the door unlocks. I know I am missing something easy here but I can't figure it out.......

BTW.... I didn't get the yellow Blazer in L.A. last weekend, I ended up with another one....the yellow one was very...very....rough... the owner was cool enough to give me my money back and we parted friends... Then I hit the net and found another one.... I will post pics soon... It is in great shape, NO RUST that I can find... ne: . It might be hidden, but I haven't found it yet....trust me, i've tried!