Body lines cab to bed

[sammywells]

Working on a swb 68 c10 and have a new aftermarket bed which looks nice but. The body line from the door and cab to the bed do not line up. The bed line is 1 inch high and needs to come down to match the other lines. Anyone else run into this on a new bed. Thinking the only way to fix is to notch the cross sill so it will sit at the proper height. Frame is straight and frame mounts to floor measure the same on both sides and truck is level.

The top line needs to be where the bottom is