Bed Installation

[JMEdwards]

I'm having some trouble mounting my bed. I had bought the 69 c10 longbed off of a guy on Craigslist the truck had no bed. I searched for about two months and finally found the be I have always wanted a fleetside. The problem that I'm having is that the bed sets above the body line. I have seen many people on the Forum say that the beds are interchangeable but I'm not too sure.

Bottom Line do i evidently have the wrong bed for the frame?

I have pictures but i wasn't allowed to upload them or something.