If you have a welder, an angle grinder, and enough enthusiasm and cash you can turn it into whatever you want it to be.
But if you're looking for a bolt on "prerunner" kit you won't find it.
It would probably handle pretty well with a long arm kit, some good shocks, and 33" tires.
I did a quick google search for "zj prerunner" and actually found this article about a ZJ that raced in the Baja 1000 in 2005
Link:
Baja ZJ
If you still have your 4runner, I would save up some coin and look at a Total Chaos kit. You may even be able to find a used kit on a forum or marketplace.
But most importantly, just get out in the desert and get some seat time. Don't get caught up thinking you need a built truck before you go wheel, just drive within you and your trucks limits. Hit some wash's, crawl some rocks, figure out what kind of off roading you enjoy most and then start slowly building your rig to meet your needs.