[BarryGMC]

GM never offered a one ton 4x4 until the 73 model year. All 60 to 72 GM 3/4 ton 4x4 trucks used a Dana 44. Basically the dana 44 is the same on 1/2 ton and 3/4 ton except for brakes / hubs. Ironically the best dana front housing is found in suburbans and blazers from 73 to early 77. 3 inch tubes, the others are 2-3/4. My opinion is the coolest 60's one ton 4x4 axle is the dodge 300 series Dana 70. They are not to tough to find and fit a gm truck easily. If money is no concern use a GM D 60. Finally if you want duals you can use any d44 with integral hubs and dual wheel adapters from any gm d60 or independant one ton 4x4 until the early 2000's.