Truck bed

I bagged my truck and the body lines from the front all the way back all line up. But, when you look at the gap between the cab and the bed its not straight. It goes from thin at top to wide at the bottom. What did I do wrong ?

sounds like the frame warped, how did you do the notch?

Or is there something in the way between the frame and the bed floor that is holding it up in the back?
He would have had to get it pretty hot to warp the frame wouldnt he?

I really doubt the frame is warped, from the top to bottom its about 1/2 inch wider at the most. Its not alot but enough for anyone to notice. Im gonna take the bed back off and see whats up.

put spacers in the back of the bed to even out the gap. thats easiest

You said the body line is straight from front to back didn't you?

He meant they are even or line up like factory just dont go straignt back like factory