i've got a line on a pair of Ford HP 44s semi-locally. i'm looking into doing an SAS swap on an 88-98 K1500 frame for my 92 (which currently has a bent 2wd frame), so this axle would be perfect for that. one is complete, and the other is said to be "housing and gears". the seller also mentioned flat top knuckles on both of them, which is good for crossover. i've got a buddy with an '89 K1500 that is interested in doing the same. what parts are interchangable with a Chevy D44, or a 10 bolt that we could use to make the incomplete unit complete again?