I just did this about a week or two ago because my reservoir was constantly empty (assuming there was a coolant leak somewhere that I couldn't find). Just for future reference, I was using this thread to figure everything out:
https://www.therangerstation.com/forums/index.php?threads/explorer-radiator-swap-into-ranger.92834/
While not a tutorial, everyone in this thread gave pretty good information. And for those finding this thread in the future, I'll add my experience.
I have an 89 Bronco II manual. The radiator I installed is supposed to be for a first gen Explorer. I actually decided to go with an all aluminum radiator. I used a Liland 1164AA3R that I bought from Rock Auto. Just FYI, this radiator came with ports for an oil cooler (I think that's what they're for). However, the ports are completely separate from the radiator cooling system, so you can leave them open if you want to once you have your radiator full, as the coolant doesn't go into this part of the radiator.
As the thread mentioned, I needed a lower hose from an automatic, since I have a manual truck. The radiator installed pretty well. The posts on the bottom lined up with the holes from the stock radiator carrier. The top of the shroud bolts right into the holes provided on the radiator. The bottom holes on the radiator didn't line up with the shroud, though. Right now, the bottom is just free hanging. It doesn't seem to interfere with the fan, so I am probably just going to do a zip tie quick fix to keep it in place, and maybe later do a better installation by drilling a slot or hole.
The only issue I had is that the upper port on the radiator curves slightly to the passenger side, whereas the original was straight. This means that I had to force the upper hose to a position it wasn't supposed to go into. To do so, I had to trim some of the end of the hose off in order for it not to be completely kinked. It's actually still just slightly kinked, so I might try to frankenstein a better solution with extra hose and couplers to get rid of all kinks.
So far, it seems to keep it cooler than before, and my reservoir is still holding coolant. The whole thing took longer than I expected, but I was also doing this in an apartment parking lot on a hot day.
Editing comment to add this: I didn't removed the shroud or the fan when I did this. I unbolted the shroud and moved it back against the engine to try to do as little disassembly as possible. This worked out fine until it was time to change the lower hose. The shroud absolutely gets in the way when you are trying to remove the top hose clamp on the lower hose (mine was the screw kind) and the radiator is already installed. Double difficult with the lift and tires, as I had to do all of this while standing on a stool; it was almost impossible to get to it from underneath. It actually would have been nice to have more room to maneuver, so even though it's more work, removing both the shroud and the fan will probably make things easier when it comes time to change the lower hose. I was trying to see if I actually needed the lower hose, so I did all of this after the radiator was installed. This would probably not be an issue if the radiator isn't installed, but positioning the hose will probably be harder once it's installed.
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