Check out this
1954 Chevrolet 3100 Panel Truck Body Mounting Points photo album.
The 1947-55 1st series 1/2 ton panel truck mounts are pretty much the same as the Suburban mounts.
2 rubber pads per wood block, top and bottom.
Wood block location. numbers 3 and 4 mounting points.
There is one rubber pad at all the remaining mounting points, in between the body mount and the frame.
Numbers 1, 2, 5, mounting points.
Click magnifying glass with plus sign on upper right hand corner to enlarge image,