as close to a 4x4 prerunner style you are going to get on a 1st gen would be either how R.J., KopyKat(with a bronco II), 410 fortune or myself are setup. We have built our trucks to go fast with 4x4, don't use any skyjacker/rancho/superlift/trailmaster drop down kits, but instead have reworked beams for extensive travel.
My setup pulls 16", I know R.J. probably pulls a little more with his coilovers and I haven't ever seen KopyKat or 410 in action to judge. R.J. and I can keep up on most trails with the rock crawler trucks (I have chosen not to lock my front end due to past breakage) and we can also roll 60 mph in washes with a lot of changing terrain.
In defense to the Rockcrawlers, I've seen DB1 and Froader as well as several others haul ass with SFA rigs and outcrawl my capabilities.
mine-http://www.explorerforum.com/forums/showthread.php?p=1957299#post1957299