Here is a picture of my box/bed assembled. I did not put the rear bolts in because the rear cross sill is slotted and I wanted to get the other six bolts in the frame holes to be able to install the rear two bolts. The measurements I gave you in the pictures is for a long bed 3/4 ton box. If your 1/2 ton long bed is the same, they should work. I'm not familiar with the long bed 1/2 ton. Is the frame straight or wider in the back like the short box.
