1970 k20 disc brake conversion

[kilokoa]

i need a little help here from someone that has done a disc brake conversion on a 1970 k20 with the aardvark open knuckle drum axle. I have a full dana 44 1973 axle here but the ring and pinion are toast. i was planning on doing the knuckle out swap and be done with it.

im getting mixed info from reading older posts on the forums. some say that it will not work because the axles are different lengths and width. and some say just swap the knuckle out and it its good to go.

so my question is can i use the 1970 axles and do the knuckle out swap or is it basically impossible because this year has one off parts that are not compatible with anything else?