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Tim,

I believe you are right that the different steering arm and drag link addition to the 1978 Dana 44, makes it fit a 64' to 66' K10 with a small lift. The first photo below shows the modified drag link. Drag link is pointed in wrong direction in photo, needs to go forward..

Now what I am doing, or going to in the 1964 K10, is the addition of newer axle from 1973 to 1987 to add power steering, disk brakes, and front sway bar. Using CaptainFabs PS conversion bracket, a 1983 K10 PS gear box, and 1978 Dana 44 ( the third photo below show both tac welded and bolted to frame, used a 83' 10 bolt to set up all the geometry, as I did not yet have my super clean AZ Dana 44 yet, wanted Dana 44 as it looks more original then 10 bolt). Also, FYI, the 83 gear box has about 3.5 turns lock to lock.

The second photo shows the Borgeson universal joints and shaft for safety and tighter steering, eliminating rag joint ( expensive).

The forth photo shows the original 1964 dana 44 with steering arm, drag link assembly, and gear box. Kind of hard to see whole drag link as gear box folded back on it. Will take better pictures and post them of original Dana 44 soon.

Putting everything together and making sure it works, before starting restoration.

Les