There are a couple of things that you will need to look into and decide now in order to find your front axle. You need to decide what T-case you are going to run because this will decide what side your diff needs to be on. For the 14 bolt, all of your 80's and maybe even into the late 70's chev 3500's will have this. Any of your 3500(GM) models, 350 (ford and dodge) is going to have a D60 in the front. I do know that you will be better off with the king pin style(stronger) instead of the ball joint and I think that the king pin style is the only model that you can run a high steer kit. I am also pretty sure it would also be a big bonus if you could get one out of a ford because in certain years they are high pinion, but then again you need to know with side you want the diff before you go hunting. I would probably post on the full size forum and see if anyone has more information.
Good luck and happy hunting
No matter how far you go, there you are.