Square would be strongest, C-channel the heaviest (my last choice), and the round tubing would be the lightest and easiest to have bent to make it look good.

Seeing as how your truck is basically a desert style truck, I'd go with the round tubing for looks and light weight. It will still be much stronger and give better protection than the stock tinfoil one.

Anyway, as for design- that is more up to personal preference. I was looking at desert trucks for ideas, but it looks like they don't even usually run a rear bumper.

This one looks a little more tire-carrier than bumper. If it were me, I'd want it to provide a little more protection and probably wrap around the corners, but I'm not sure what you're looking for. I'm not sure it would satisfy your local LEO's.


Maybe something that was kind of a combo of the tire carrier above and this Allpro bumper:


Or another from Marlin: