Being one of the handful of 4 door owners, here's my take:
Four doors have a few advantages and disadvantages over the 2 doors. The disadvantage is that 4 door specific parts are damn hard to find. You can get away with a few things that are shared with wagons in catalogs, but mostly you are hunting junkyards or modifying other GM parts if you need to replace something behind the drivers seat.
The major advantage is that 4 doors have a frame around the windows instead of the frameless design that the 2 doors have. Doesn't look quite as cool, but generally seals a whole lot better. This also means when you happen across a project like this, it is unlikely that there has been any water intrusion into the cab. No water intrusion means you are ahead of the game on interior quality and floor pan rust. They could still be rusted out but not as likely.
Another advantage is there is no difference from a 2 door when it comes to drivetrain other than driveshaft length. Assuming the worst case scenario, a motor swap is pretty straight forward and is pretty well covered in different threads on this forum. You can stuff pretty much anything your wallet can tolerate in there, but any running motor is better than any non-running motor. A cheap truck small block may be an easier ask to get going than an LT1 drop in drivetrain or an LS swap. Not that it can't be swapped to something cooler later, but a running and driving project is far more likely to get finished than a pile of cool parts under a tarp in the garage.
I would absolutely get it running and driving and make it a fun driver. I would also let it be ugly. It has a good patina, and pristine paint didn't make anything go faster. I bought mine for $300 and have put two different motors in it and put 10,000+ miles on it. It's still baby sh*t green and has a big dent in the rear passenger door. It is also mechanically perfect and will go as far as 16 mpg will take me.
Also, Vegeta wasn't a better father than Goku, he just cared in a different way.