I had two Troopers, both were 1987's. I had a two door that was in really great shape and I regret selling that rig so much! I had it set-up just right. I had been going up to northern Alberta quite a bit and had some buddies that spent a lot of time in the bush help me do it. It had brand new paint and was levelled off, not really lifted. I ran 31 10X50's on American Racing wheels, rear locker. It was gas and I had a 42 gallon tank installed so it would go quite a ways between fill-ups.
I also had a four door diesel, I wanted to put the oil burner in my rig but my wife ran it to death... oh well. Have you looked into a Nissan Xterra? It really reminds me of a Trooper, especially with the offroad or Pro4X package. I have a 2011 Frontier Pro4X and love it. You can still buy a new one with a manual transmission. The Pro4X package consists of skidplates, rear diff locker, off road lights, heavier suspension and if you have an auto and tow package it comes with a tranny cooler and engine oil cooler. I bought my 11 new and love it. It just turned 90K miles with 0 issues. I wanted a pickup bed so I bought a crewcab PU instead of the suv. The Frontier and Xterra are mechanically nearly identical.