You have a decent setup, but the only thing shared with what the OP wants to do and your setup is the motor mount plates and the year of the truck. He's going EFI, and using different headers...
SVT
Additionally:
1. "Relocate that weird box on the drivers side" Fuse box, lol, mine is gone, made my own, you only need three master fuses under the hood and retain interior fuse box.
2. "Radiator w/ electric fans " if he is crawling off road,, the OEM radiator is inadequate,,, go Griffin
3. "My biggest concern is electrical. " I would go with an off road Holley Truck Carb,,, rubber needle seats....
Do I need a tuner?,,,,,,, yes if you go EFI
Do I need a body lift?,,,, yes
Do I need a elbow for the intake?,,, dont know what he is asking here
Easiest radiator to use? none
Is trans mount a direct fit? Probably not,,, dependent on motor mount used
Is there like 4 wires I modify or 30?! 100+ if you do away with that weird box
"The Off–Road Truck Avenger is Designed Specifically for Off–Road Applications. The Unique Fuel Metering Block Eliminates Fuel Spillover through the Boosters at Extreme Angles Allowing for 40 Degree Climbing, 30 Degree Side Hill Maneuvers and Nose–Down Descents to Avoid Hesitations, Stalling and Flooding Typically Associated with Carbs in an Off Road Environment."
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