For the period look and brand reputation, they are a good choice.
As far as legality on the road, other than fog lights and driving lights, that mount down low, halogen or otherwise, none of them are road legal. Part of it is the light pattern, part of it is the wattage (brightness). And part of it is where they are mounted.
There are benefits to halogen lights, them not icing over, the type of light they produce, and where they are in the color spectrum are all pluses. The power requirements are a huge negative. Some engines in the Rangers have aftermarket alternators you can get that offer more power output without special modifications. The 4.0 SOHC is not one of them, but I seem to remember that most of the other engines have options.
LEDs do offer more variety and require significanly less power to use. Not everyone can handle the light pulses and color spectrum they produce.
So, it's kind of a "pick your poison" type thing.
Check with you local laws on auxiliary lights also. Other than fog or driving lights, you may be required to cover them when you are not driving off road.