Okay. My first piece of advice is out the window.
Since you want to convert your truck to 4WD, the D60 is the way to go. There's a solid Dana 44 that would work too, but it isn't as strong as the D60.
There is a couple of problems you're going to face. The first is money. A driver's side pumpkin D60 (kingpin 85.5 to 91, balljoint 92 to 97) is specific to Ford alone (Dodge and Chevy are both passenger side) and they are not cheap. If you're lucky, you'll be able to pick one up for less than $800. More realistically, you're probably looking at least $1K. If you find one at a junkyard or off of a parts truck, make sure to get the springs, the driveline and all associated parts. This is obvious but important: check the gear ratio before you install it. If it's not the same as your rear axle, it's not a big deal, but you'll have to buy a new ring and pinion set. This will add to the cost.
Chances are, since you've just bought a used frontend, it's going to need some work. Depending on what it needs, you could be looking at less than $100 to a
whole lot more.
Secondly, there's the issue of your transmission. Since your truck is a factory 2WD, you don't have the married transfer case that the factory 4X4 trucks had. You've got two options: either find a factory 4X4 transmission or run a divorced t-case. For the least amount of work, you'd be best off finding a factory 4X4 ZF-5 speed tranny. If you decide to run a divorced t-case with the tranny you've got, you'll need to have a custom front driveline made as well as an output shaft from your tranny to your t-case.
Lastly, once you've got your frontend in reasonable condition, you've got to mod the frame to accept the axle.
As you can see, this conversion is a whole pile of work and a chunk of $$$. If you decide to do this, in the end it'll be worth it 'cause you'll be the one to have done the work. And that's why we're all here.
Good luck!