Not going to chime in on gear ratios. That's a whole other debate.
But yes...go get a 14 bolt. You can find 6-lug ones in 1500 trucks with the F44 package, some of the earlier models were badged as 2500 (I'm working on one right now, it's a '94). An easy place to look for them is in 1500 4x4 Diesels. I believe they were all optioned with 6-lug 14 bolts.
In case you didn't know, 14-bolt means it has 14 bolts holding the diff cover on. 10-bolt means....10 bolts
Go look and see if you can find one in a junkyard with that setup and 6-lug hubs, so your rims will mount up. As said earlier, if you get an 8-lug you will either have to run different rims (don't recommend, as you can't do tire rotations), or get the axles/hubs changed.
As for gear ratios, look in the glove box at your RPO codes.
The commonest ratios are:
GU6 = 3.42
GT4 = 3.73
GT5 = 4.10
G80 obviously means it has a factory G80 locker. These codes are the same no matter what rear end or year of truck you have.
14 bolts are considerably stronger than a 10 bolt, they will bolt right up as long as you get one from a 4x4. If you get one from a 2wd, you will need to do some modifications as they are narrower.
Either way, the u-joints are of a different size so you have two logical options: get a conversion u-joint (I forget the part # off hand) or just swap the yoke off your 10-bolt onto the new 14-bolt. It will bolt right up, and you can use stock u-joints for your truck.
You may need to use the e-brake cables off the donor truck. I'm not sure.
I'd highly recommend this mod...