I wore my seatbelt in my 1979 Subaru Brat [which looked like a pickup]. I totalled it when I ran off shoulder on dirt road, rolled 360, and ended up facing the direction I had come from. I remember watching the windshield fly out as I rolled, & thought to myself that I would have done about the same if not buckled in. The thing is, for the one person who survived a wreck while not wearing a seatbelt, the 999 others who did not wear their seatbelt died, & are not here on TBN to tell us about their foolishness.
Did you have the seats in the bed. I believe they also had seat belts.