Bed mounting questions

[Hogger54]

I'm almost ready to mount the bed on my truck, but I'm a little confused. Truck is a '54 3/4 ton, and the bed from an earlier year(slant bed rails).

Do the bed cross sills attach directly to the frame, or do they sit on blocks?
Everything I've found shows doing it both ways. Or is it just trial and error to see if the cross sills are tall enough to clear the axle hump?

[OrrieG]

Check the link in my signature. It lands you on a 56 truck page, scroll down and click year index, then your rear and start looking. I do not know if it has that level of detail, FAM does. I thought all the AD 1/2-1 tons beds had wood blocks, but if the heavier trucks have deeper frame sections, maybe they do not?

[mr48chev]

I have my truck sitting on a 54 frame and it was trial and error as far as the blocks go.
I'd start with the front and back and level it so that the top rail of the bed was on the same plane as the running boards and the style line across the door. You want those three lines to be on the same plane when you stand back and look at the truck from 30 feet away.

Then I would put the spacers/blocks under the cross sills.

If you don't want to assemble the whole floor before setting the box on the truck I'd put in the two outside boards, put the cross sills in place and then set the bed on the frame as you need the outside boards in place to be able to bolt the bed down.