next mod - crawler

[Deacon]

  I have a 2003 DC TRD 4X automatic V6 3.4L with Donahoe coilovers in front and Deaver 7 leaf in back which gives 2.5 in lift. Also a 1 in RB BL. DeMello sliders and front bumper and a modified All Pro rear bumper. Wheel wells trimmed an inch or two with Bushwacker flares, leaving plenty of room for my 33's. Warn winch. Still IFS and will probably keep it that way a few years, as long as it is DD.
  I drove a friend's DC at Calico and he had a Marlin Crawler. So that's instantly at the top of my list now. I want to add a Crawler and possibly 35's as my next project. What all is involved? Which crawler box do I need (I want the 4.7)? What adapters?  I'm guessing both my driveshafts will need modified. I was thinking of going to 4:56 gears for the 35's, does the crawler box make any difference? Is this a good time to throw in an ARB in the front? How much work is the installation? I'm not a professional mechanic but I think I could handle this, with lots of internet help. Suggestions? Estimates? Warnings?