I axle swapped my K5 when I built it with a D60 front and 14BFF rear. I spent a lot of money adding lockers, gears, powdercoating, big brakes, etc. 3 days after completing the truck I did a little jump from the street into the parking lot. Probably got 1-2' of air under the front. The D60 housing split where the tubes went into the cast housing at the rosette weld area on the long side. I couldn't find another D60 front so I built up a D44 with a Conferr truss and also welded the tubes and rosette welds. Never had a problem again.
Had the same problem in HS on my Jeep CJ7, we had a jump behind the HS that several of us would jump everyday and get a good 3' of air. I broke a front housing the exact same spot. Put a new housing in with a truss and never had a problem again.
So if you ask me if they work, even just the cheaper bolt in style, I'm going to say yes based on my experience.