Morana racing has Ranger 3.0l supercharger adapter kits: Tom Morana Racing Engines
These require less room, which is at a premium in the Ranger engine compartment.
And much easier to install overall.
While turbo charging is more power efficient since it uses waste exhaust pressure, the point of either is to increase the amount of air that can flow into the cylinders and there by increasing the amount of fuel that can be burned, which results in more available power.
There are quite a few people that have done custom turbos for the 3.0l, but the key word is "custom" so you would need the ability to DIY all the parts yourself.
You would most likely start with a "universal turbo kit", google that
You would then need to "customize" that to fit into your engine bay.
You are pretty much gambling at anything above 6psi boost with a stock engine.
Super or turbo charging will run you $2,000 and up for the parts, new.
You can often find late '90s Explorers with 5.0l V8 engines for much less, and like the saying goes, "there is no replacement for displacement", so with this swap you get your horsepower(and torque) increase, plus there are ALOT more upgrades for the 302/5.0l engine than the 3.0l, if you chose to go farther.