From: http://www.therangerstation.com/tech_library/Dana44.htm
Recommendation:
The best Dana 44's are the 1976-1977 units with 297x u-joints, disc brakes and weld on radius arm mounting brackets (wedgies) that can be cut off. These should all be reverse cut high pinion units. The 1978-1979 units are just as good as long as you want to retain the factory style radius arms. The axle tubes are pressed in to a casting for the radius arms and do not go all the way through it. This means you can't just cut the mounts off like you can on the previous year axles. It is possible to shorten these axles for use with radius arms though. For more information click HERE. If you wanted to use the 1989 [I think they meant 78 here] -1979 Dana 44 for a leaf spring or link suspension setup, you would have to completely rebuild the housing with new tubes.
The other axle of choice would be the 1977-1979 F-150 Super Cab or 1978-1979 F-250 Dana 44's that were setup for leafs. Remember that'll you'll have an 8-lug wheel bolt pattern with the F-250 axles.