Howdy from over here on the other side of the Pond in Poulsbo!
I think I saw your Trooper in the Offerup last week! There were 2 almost identical V6 LS's that came up for sale and were very quickly snapped up. Becoming a cult classic, for sure.
The 15x6 LS wheel might be a tad skinny to fit 33's. The factory "big tire" setup was with the 15x7 Snowflakes and 31x10.5 tires. This package also came with rear mudflaps.
Check out the "Wheels & Tires" forum, lots of good info and advice there:https://forum.planetisuzoo.com/viewforum.php?f=16
If you're set on 33's you're gonna have to do a mild lift to make 'em fit better. A set of lift shackles on the back and a mild height increase adjustment to the front torsion bars usually works. An upper ball joint flip would help to restore suspension geometry after a lift. Use the Search feature here to find postings about that.
Independent 4x sells quite a few nice suspension bits for the ZuZu including leaf spring lift shackles, ball joint spacers, shock extensions, poly bushings, etc etc. Check out the parts here:https://www.independent4x.com/Leaf-Susp ... _c_58.html
You might be able to score a decent deal on factory or aftermarket wheels with the 6x5.5" (6x139.7mm) lug pattern and approx 4" (100.5mm) center hole. Just watch the offset, there are a lot of strange ones out there.
I've seen a Trooper with 15x7 Colorado rims and they didn't look too bad. They don't have as much negative offset as the stock ZuZu wheels though (tucked in a bit). BTW the Colorado rims are a perfect fit on my 2WD '98 Frontier. Nissan wheels 2004-earlier have the correct 6-lug pattern and will fit the Trooper hub. Note that the Trooper hubs are not hub-centric by design, the factory wheels use beveled lug nuts.
I bolted up a set of Toyota 4Runner wheels a while back to an '89 RS. Those wheels are hub-centric and you might even be able to find the plastic hub adapters that would make them fit perfectly. What I did was bolt 'em up with 3 equally-spaced beveled lugs, snugged the lugs down to center the wheel, then used straight-shank lugs on the other 3 holes. Torqued them down, replaced the other 3 with the correct lugs, and they ran smooth as silk. So that's a way to get 'er dun and there are Tons of 'Yota wheels out there in the Craigslist, Offerup, and Facebook Marketplace.
HTH & enjoy your "new" Trooper, and Welcome to the Planet!..........ed