John,
The E-Z Kit is designed for the 2WD chassis, the 4WD is a little different up front. There was talk about a 4X4 Kit for the 47-53 trucks but there just wasn't enough interest at the time. Let me see what I can find out. I agree the 4X4 would be nice to fill out the bigger fender holes on the big truck front clip. I've always thought it would be fun to build a giant 4X4 truck using an AD big truck front clip, and a 80's full size 4X4 pickup or burb chassis.
Mongo
