Stepside bed supports? Am I missing any?

[GMC"ER]

I am getting ready to start on my wood for my bed. It is a 69 GMC stepside. I had not really looked at it before that closely before now and I am not sure but I think that I may be missing a metal support or two? It had a sheet of aluminum in it and after I took it out getting ready for my wood I just thought that it was missing a support or two. Here is a picture it is kinda hard to see in the picture but I have two of the larger supports in the front part of the bed then with a smaller one then there is another larger one toward the back with nothing in the center. This may be right but not for sure as the truck had been taken apart before I bought it so I have no clue how many or were they belong in the bed. Sorry for the bad picture hope you can see it alright? Thanks for your time, Robert

[lilpoindexter]

On my '78, It looks like there were three pieces in front of the axle hump, and two behind.

[blkcorvair]

Nope. You Gottem all. two Large one in the front followed by the smaller one. And One Large one in the rear

[GMC"ER]

Thanks guys! I just was not sure if I had them all or not the center just seemed to be a large span with nothing in the middle. Thanks Robert

[blkcorvair]

I belive the wood actually rests on the frame in that area

[CC69Rat]

If the wood rests on the frame rail in that area .. Would a bolt in CNotch cause it not to fit properly? Adding that extra top piece of 3/16" thickness (or whatever) to the height of the frame rail? Humm..

I have a stepper too, about to get a CNotch from PB. Just curious.