'55 bed cross sill mounting question

[mygirlz55]

When we purchased the truck, there were alot of things not bolted down etc. The bed was one of those things. There wasn't any wood and the cross sills weren't all bolted down.
Anyways, I'm at the point of assembling it all and would like to know how the cross sills are supposed to line up along the bed.
I know where the front and the rear ones go, but the other two that I have are the ones in unsure of. One is shaped differently than the other. Also , how do the bed sides connect to the cross sills?
Sills bolt to frame. .. then wood lays down. .. then bed sides sit on top of wood and bolts through to cross sills?
Any help would be appreciated. Pics would be even a bigger help.
Thanks

[lv2tri2]

I have questions with the sills as well, looking forward to yout responses

[samples45]

Originally Posted by mygirlz55

When we purchased the truck, there were alot of things not bolted down etc. The bed was one of those things. There wasn't any wood and the cross sills weren't all bolted down.
Anyways, I'm at the point of assembling it all and would like to know how the cross sills are supposed to line up along the bed.
I know where the front and the rear ones go, but the other two that I have are the ones in unsure of. One is shaped differently than the other. Also , how do the bed sides connect to the cross sills?
Sills bolt to frame. .. then wood lays down. .. then bed sides sit on top of wood and bolts through to cross sills?
Any help would be appreciated. Pics would be even a bigger help.
Thanks

I dont have my mar-k instructions in front of me but the first cross sill goes 2 and half inches away from the front bed panel. the second sill goes 20 something inches away which is the first cross sill in your picture and the 3rd sill goes 50 something inches away from the front bed panel.. like i said dont have my papers so i hope that gets you close. and yes the sills bolt to the frame but they also bolt to the angle strips that are spot welded to your bed sides.. hopefully someone will chime in with some pictures before i can

[57chevyman]

the different looking cross sill goes by the rear leaf springs. i had the same question when i was putting mine together

[57chevyman]

if you use a wood kit with pre drilled holes, the holes tell you where the cross sills go.

[mygirlz55]

EXCELLENT
Pictures help out. Just what I needed.
Thanks so much guys. 👍👏✌

[oldcouple]

That's funny, mine are both the same, so must not really make much difference unless its for points at a restoration competition.

[Speedbumpauto]

The front one has 2 captive nuts on each end for the running board brackets to bolt to.