[1968_K20_4x4]

Hey guys... So I'm back with some more questions. I've been looking around for a nice Dana 44 out of a 71 - 76 truck. I've found a few, but so far they're all with a 4.10 gear. I did find one with my gear ratio of 4.56, however it was from a 77 truck and had the smaller hubs. I want the big hub style so I can reuse my locking hubs i currently have on the truck. So my question is this: can you take off the hubs, spindles etc and install hubs and spindles from an earlier model of axle? Will it bolt right up? Are the axle shafts still the same? Or is this too much hassle and should I just wait to find exactly the axle I want

My next question is: my axle currently in the truck has the power-lok posi unit. I wanted to take that out and reuse it in whatever new axle I find. Can I do this without having to worry about the lashing of the gears? Or if I change the carrier will that throw everything else out of alignment?

Thanks