Awesome score! Your front axles will both be Dana 44 with closed knuckles and drum brakes, unless swapped for something newer.
The rearend in the 3/4 ton is an Eaton H052. Search around here for more info on this axle, chevy used it from 46-72 under 3/4 and 1 tons. As for the rear in the half ton, I am not sure. It may be a common 12 bolt, or it may be the older Semi-float axle that resembles the Eaton.
