I did this, but only because I found a good deal. The 44s I found were built out, with the weak point being the stock lockers, but any locker is better than none I'd say. The seller had them listed for the price of the upgrades he bought in 2020, most of which got quite a bit more expensive by the time I bought the axles. He didn't upsell (much) for them being dana 44s, and overall I saved a good amount of money. All of this is to say, it's not worth it if they're not built out for a fair price or stock for very very cheap.
If you still want to go through with it, you technically don't need much. Assuming you are getting the pumps (which you should or the whole deal is not worth it), just drill holes in your abs tray and wire from there with your own switches. You'll have to shorten your driveshafts a fair bit and if you're keeping the pinion yokes as they are you'll need 1310-1330 u joints to connect the driveshaft to the axle. Last thing I remember is new parking brake cables for the disk brakes. Aside from that everything else bolts in the same as your current set of axles.