I'm working on a platform that is intended to be mounted to the M103A3 trailer. What I need is a blueprint of the trailer so I know the size and location of frame-rails, mounts..etc. I know the chassis drawing is 8358991, and the frame assy drawing is 7979967, and that the NSN for the trailer is 2330-01-141-8052. I have a few tech manuals, but nothing that gives me firm dimensions. Any ideas where I might find this info?