Its pretty hard to say what could work, without looking at your Commander. Those AMC Jeeps had a wide variety of parts from different manufacturers as the years passed. Stuff that worked a year or two before or after may not work at all on the Jeep sitting in front of you.
As an example, I had a 78 Jeep J 10 pickup and an 80 Jeep J 10 at the same time. The 78 had an AMC 360, a GM trans, and the front axle had the drive shaft on the right side of the motor. The 80 AMC Jeep J 10 had a 304(?) AMC V8, a 727 trans, and the front axle had the drive shaft on the left side of the motor. When parked side by side, both trucks looked nearly the same (different grilles), many body panels were interchangeable, even the wheels would swap, but nothing drive train wise would interchange (except maybe the motor, the 80 motor was dead, and the 78 was a rust bucket I had other plans for). The original intention was to put a 318 I already had into the 80. It already had a 727, so I thought I was good to go, I had no idea the AMC bell bolt pattern was different then the 318 bell bolt pattern.
With that said, I would probably look into the drive trains you thought about, but I would probably like to park one of the potential donor rides side by side with the Commander and do lots of measurements and comparing. Don't over look, or simply write off things like suspension changes and wheel track measurements, they could mess with you bad, or it may be a simple bolt up deal. As a general rule, I go with the plan that most modern stuff doesn't inter mix with older stuff, so you use one process or the other and join them at the most simple place. Then anything that actually does work is a huge plus and a pleasant surprise.
As a side note, I put an 85 Dodge D 50 (Mitsubishi truck) sheet metal on that rusty 78 J 10 chassis, 360 4 bbl and all! I had to extend the front fenders and hood 6" to get the wheel base close. It was suppose to be a beater for the old railroad back wood swamp near my shop. That D 50 body was way lighter then even the rusty J 10 body. With it in drive, from a stop, opening the 4bble made the entire truck jump off the ground! My son, his buddies and myself had a blast with it for a few weeks. Every time we took it into the woods, something broke off, fell off, or got knocked off. You had to wear a helmet and the seat belt to keep from banging your head on the roof. Then some guy stopped by and handed me $500 for the D 50, and he took our toy away. That probably as a good thing, he told me he killed the D 50 about a month or so after he bought it, with a smile on his face.
Then there was the day we put a 318 into a friends Pontiac dirt track car, or the 318 into a 63 Chevy pickup. There have been a few where I just couldn't think far enough outside of the box to make them work within some form of reason and I had to give up.
