I installed new cv shafts. Bearings. Brakes. Tie rods ends drag link. Ect..... so " junk yard " axle is a 50/50. As you don't know what's inside the pumpkin
I did some reading and it appears to be a drop in but you will need to put the ring gear on the Tru-Trac. I'd pay a pro to do that. I am thinking a good used D30 with the QD drive diff might be cheaper.