Look at those tires! Go ahead, LOOK at them! That's actual dust on there!
I've forgotten to take my meds again.
Klown, you have the advantage of starting out with a good looking truck right out of the box, complete with the interior. This one looked ridiculous, with NO interior and blinking LED's in the wheel spinners.

I just noticed today that this thread started almost a year ago, in March, 2009. I took some time off along the way for a couple of helis, but this was definitely the most involved R/C build project in over 20 years.
Once I had the wheelbase measurements and widths I measured RC cars and trucks at the hobby shop to see what I could use. I decided that no crawler would work because I had to have independent 4 wheel suspension as well as 4WD. That was based on all the pics I looked at of the real HVs.
It's been through a lot of changes, chassis wise, but it all came together nicely with Revo parts and slayer A-arms.
For the frame I started out with plastic beam stock and rough cut and glued the tubes or square beams together for a mock up. Whenever I had something that would work, I'd duplicate it with brass stock and silver bearing solder for maximum strength. The two main rails have another inside rail for extra support as well as the round tube on the outside on top. The fact that this thing could wheelie all that weight without folding in the center says it's good to go once it's mounted in the body. At that point, there won't be any more load on the center since it gets rigidly mounted on each suspension half, and the center is only for alignment.
A few changes as it went, some desoldering and resoldering, and eventually it all came together.
The body has also been going through some detail changes to keep me busy while I waited for new parts to arrive.
I'll get some pics of that a little later.