A 4"x4"x3/8" bumper is not small at all! That's what I have on the front of mine and let me tell you!!! When I first reported in here, I was driving like a mad man down a dirt road on the other end of base after about a week of rain and went sliding out of control and into the woods at about 25mph. It slowed a little, but I still smacked a tree at about 10-15mph and nearly broke myself into two pieces! The impact lifted my back wheels off the ground and sheared off the grade 5 bolts I had used to fasten the bumper on the frame. I scraped the paint off of it, but there was no damage to the bumper at all. At thirty or fourty - it'd knock today's production cars clean in two! My buddies now call it the "tree bumper" for obvious reasons. [img]/wwwthreads_images/icons/blush.gif[/img][img]/wwwthreads_images/icons/cool.gif[/img]
To protect myself in DC traffic and still have usefullness on the trail, my bumper has a shape about like this: (looking from the top and not to scale mind you)
I still have the protection that you speak of, but still retain a good turning radius out on the trail. Just another idea for you, but trust me 4x4 ain't small at all!
As far as your steering box goes, you shouldn't (in my opinion) be straddling obstacles anyway. It is good to have a skid plate, but if the obstacle hits your bumper - you're not going over it anyway! You can get a piece of 4"x6"x1/4" and weld it to the rear bottom side of the bumper, bent back at a 45 degree angle, and cut off the same drop as your box for a skid plate.
Liberals don't mind being lied to . . . they just want to be lied to by someone they trust!