So I thought I would tack one side together and see what's what. Everything is still mobile (movable) - I just want to see how it all works together.
Tacked up three pieces - one each at 16, 17, 18" plus the 3/8" plate. The different lengths are due to the frame tapering.
This is the basic cross section of my slider. There will be provisions for a High-Lift jacking points as well as a boot friendly step below the front section of the bed.
So there is:
A 3/8" plate that will be bolted to the frame (6 bolts in each)
A 2"x4"x0.125 wall rec tube tapered to 2"x2" (taper is to clear the body and reduce to 2" for the round tube)
A 2"x0.120 round ERW tube sitting half under and half outside the body
A 1.5"x0.120 round ERW tube sitting off the 2" at a slight upward angle

Some of you may say that I should go heavier but I think I am OK for a couple reasons: A) I am not making a rock crawler or even a hard core trail rig. It's a daily driver/ expedition type rig. 2) One reason everything is bolt on is I can learn from use and make changes as I go if required.