Road friendliness is no problem with the 4.88s. 3,000 rpm gets you 80 mph and about 2,600 is a very happy 70 with 33x10.50 BFG's (which actually measure out to about 31.5" tall). There have been zero times I wished for stock gears again after going to 4.88.
Keep in mind the line out is the max...
Nice truck and documentation. I put a big Derale Atomic cooler with its own fan on mine. It's 100% necessary. I can push trans temps to 240 even with the cooler (extended wheeling in mountains). Stock gears are hurting the situation too. More effort is now required to get and keep the truck...