Installing Bed on Frame on 86 SWB

[11555wally]

I'm putting the bed on my 86 back on the frame and it doesn't feel like it fits correct, as if something is holding it up. I have it on the frame with all 8 bolts going down thru the frame but not tightened up. It seems to rock back and forth if I move it. If I push the left front corner down the right front corner comes up about 1". If I push the left rear corner down the right front corner comes up about 1". I have the bed up in the air and see no obstructions. The spring mountings are below the top of the frame. There is no pipe or anything I can see that would be hitting. For those of you that have done this before, would that be normal? I have it trailered around a little bit to the body shop and it got moved around there and might have gotten tweaked I'm sure when I put the nuts on it will pull the corners down, but was wondering what experience you folks have had. Thanks for any suggestions or comments. Larry