Same year and similar styling to my Pathfinder, also a Chevy 454.
Mine looks like it has lots of room for fully skirted wheels. I want to do a full belly pan and have thought about a combination of OSB and Coroplast. CP for the areas that house the generator and water tanks, etc., and OSB to make the bottoms for more storage underneath. I don't want to lower it because as long as it is, I don't want to further limit where I can take it. I want to reshape the front, take off the A/C and awning, replace mirrors with video, and taper the rear section and add a boattail.
But for now it's covered and under a layer of snow in a Colorado Rocky Mountain Winter...