Yea, I thought about that.  I used 2x4 steel square tube, Now looking back I have little to no side protection.  If I were to do it again I'd use 2x6.  I'll probally try to fab in some unber body boat side sliders (frame to rocker) and maybe some fancy tube to give a little more door protection.  Mine is just stitched into the sheetmetal but the thin stuff it attaches to will hold the weight of the truck, Tested it last time out (Smashed down on a few rocks).  The 2x4 Tube fit sung in the rocker pocket.  I just cut a notch out of the top of the 2x4 for the inside B-pillar support.  Once you open it up you will seee what I mean. ÂÂ
Mine are snug to the bottom of the doors and filleted on each end to match the inner fender line.
In the first picture their is a small line about .5" down form the top of the rocker.  This is the original rocker Sheetmetal foled & hammered over to new square tube and seem wleded, ground and smoothed.

Yes one side is black and the other side is hammer coat silver.  I couldn't decide, But I think I like the black.



