Avoid the vacuum disconnect versions , go with mid 80's.
It's gonna be a six lug ( Chev , Toyota ) , not too difficult to convert. Aftermarket support is there for alloy shafts ( Warn , etc. )
Bonus with this conversion is bigger brakes , larger tie rod & drag link , 30 spline shafts which are larger and stronger than in a Dana 30 , servicable wheel bearings , bolt on locking hubs etc , etc.
Dana 44's have been made for a very long time and used in a wide variety of vehicles so aftermarket support is a mouse click away.
A waggy rear axle would compliment this , easy install , much of the above applies , with the exception of axle shaft availability. Disc brake conversion on the rear is cheap and easy. Doing both ends solves the six lug wheel issue.
If you decide , your not man enough to handle the conversion , I'll buy it from you , this is that $100 one right ?