28/29 Ford RPU wood placement

I'm building a 28/29 Roadster Pick Up and need direction and diagrams on how the box is attached to the frame with the wood sills and subrails. Any photos or drawing would be appreciated.

 

My 28 is still in storage down the road - when I get her home - I'll reply and post some pics for you.
Mines bone stock - I'm selling two of my cars right now to fund my rod project - not sure when the A will be in my shop.
Hopefully soon.....

 

Dont know easily how this could be explained but take a look at Mack Hils Products website or call them for a publication they produce about these beds or take a look at a Snyders Antique Auto Parts catalogue, should give you a fair idea what parts are needed and how it comes together.