See if these help.
You might have to enlarge them to see where the blocks and pads went.
http://s1130.photobucket.com/albums/m533/peterharbo/Bedboards/
The block and pads are available from the usual gang such as Jim Carter. Try part BP137.


1951 Chevy 3100 5-Window
"Howard"
In the Stovebolt Gallery
More pix on Photobucket