Bed seems crooked?

[jel111]

Hey all I have a ?- I have a 66 c-10 and it seems the bed is mounted crooked. I have looked at the mounts and it looks like they have no play. What makes me think that it is the bed thats crooked and not the cab is that obviously it doesnt line up with the rear tires. It is closer on the passenger side tire than the drivers side. Now I have looked at everything and it seems to me it has to be pushed over towards the passenger side to line up with the cab which would make the rear tire situation better as well. What could be the possibilities here? I know that could be a lot to type but I was thinking the shoes that the front of the bed could be leaning? Thanks everybody can't wait to hear from ya all!!!!!!