Bob,

You can always do what I'm doing to my '59 3800 (1 ton).

I'm mounting a Dana 60 from a '87 K-30 (bolt in, same spring spacing) and a Dana 70 from a '93 P-30 cube van (have to move the spring perches in a little on each side).

It'll be a 1 ton dually 4x4 when I'm done with it.

Lane