Help on bracing for installing new body mounts

[swyfor5]

Done some research here, but looking for help. Need to replace my body mounts, and have a new poly kit with new hardware. My rocker /torsion boxes are there but pretty rough. I know I need to leave the top on to set up for this project, before I start. Seen a couple threads that showed door, top, etc, dimensions. Seen some welded up braces to support the door areas and the tailgate area. Anyone got any help in this area as far as actual measurements for the braces, so I can get them fabbed up and ready to go ? Any thoughts?