If you're looking for an electric fan conversion, check this out.
https://www.therangerstation.com/tech/volvo-electric-cooling-fan/
If you can find some of these parts in a junkyard, you can do this swap cheap. My brother and I went to a junkyard a few years back and sourced all of the parts to convert our Rangers to electric fans. I think we paid like $50 each for our fan assemblies along with all the other little parts we took. He went with the swap described in that article - the Volvo fan, Volvo relay and BMW temp switch in the upper rad hose. I went with a fan from a 3.8 Thunderbird, the Volvo relay, and the Volkswagen temp switch. Both of our setups work great. We both bought new Volvo relays just to ensure reliability, but found a few Volvo's with similar relays to take the connectors from. You also have a few choices of temperature switches to use with different temperature ranges.
You said you were looking for a swap with minimal modifications, this swap didn't require much at all. I had to modify the 3.8 electric fan assembly a little to fit my truck. The only modification I had to actually do to the truck was cut the upper radiator hose so I could put the temperature switch in line with it.
Like others have said you will free up some horsepower, but I doubt you'll feel it. What you will notice is the slight MPG increase and a much quieter fan. My brother has a 2.3 4WD 5 speed, and before he would peak at like 27 MPG. After the e-fan swap he almost hit 30 MPG, 29.8 or something like that. I gained 1-2 MPG as well in my 3.0 4WD 5 speed Ranger after the swap. In my case, I also gained more room between the engine and fan shroud with this swap which makes some maintenance jobs easier, so there's more than a few benefits to the swap and I would highly recommend it.
Other than that, I would suggest you do a coolant flush before you swap your radiator. In my opinion, you shouldn't need to use a 180 degree thermostat to stop from overheating. I recently flushed my coolant and put in a new OE temp thermostat and the cooling system now does a great job at maintaining the temperature. Before the flush, the temperature gauge would be right at the halfway point when I was driving, and the low speed fan would kick on relatively often. After the flush, it now rides a little below half and the low speed fan rarely needs to kick on. To me, that shows that the cooling system (when clean) is plenty sufficient. And by the way, I'm currently living in TX and haven't had overheating problems yet, even before doing the coolant flush.