When I said Land Cruiser, that would include the Lexus GX470, a Land Cruiser with luxury fittings and an extra $10,000 on the price tag. The Lexus is probably easier to find used, as the price of the Land Cruiser tended to put it out of range for non-luxury buyers, and luxury buyers don't mind the extra cost for the Lexus nameplate.
4-Runner is a mid-size, finding it with the V-8 would be good, as with Explorer or TrailBlazer/Envoy, but for any of those the six cylinder is also adequate for a Scamp or Casita. All of these six cylinder 21st century SUVs are more powerful than small V-8 sedans and wagons we used for towing inthe 1950s, actually more powerfull than many of the GTs we were running in endurance races in the 1960s.