New bed wood, what am I missing here...
 

I know I ain't the sharpest knife in the drawer, but I read about these beds being re wooded off the truck. How the heck do the crossmember supports that bolt to the frame end up being in the right place to line up the long bolt mounting holes? None of the prepunched square holes on the side flanges are close enough to just line them up with those. I've got my longbed step sides and rear all put together and squared up, but it seems I've GOT to line up at least the rearmost V notch mounting spot on the rear lower tailgate piece with the frame hole, then mount the wood and make sure the crossmember pieces line up with the frame hole as the wood goes in....am I missing some trick or should the bed strips and side flange holes make everything match up when assembled off the truck..??

Re: New bed wood, what am I missing here...
 

Can you get some pictures of the box.

Re: New bed wood, what am I missing here...
 

Have you looked at the Mar-K companies instructions on where everything goes?
It will indeed answer your questions. The crossmembers that attach to the frame align with the side (square) bolt holes in the bed sides. Their web site shows where they are.
Get-er-Done.

Re: New bed wood, what am I missing here...
 

Thank you Rocknrod for that info. My '66 has no bed floor to speak of and I needed a source.

Re: New bed wood, what am I missing here...
 

Here they are:

Re: New bed wood, what am I missing here...
 

You can look on the internet. My truck was a long flat bed. I cut the frame then installed a short bed. I found everything on the internet.