Yep, Eaton rear, Dana type 60 front axle, it appears. That's a good combination as long as the gear ratio of both axles is the same. I worked on a factory-original C-10 4X4 once, with different ratios front and rear- - - - -a 3.08 in the rear axle, and a 3.07 up front. I believe that one had a full time 4WD system, and the front/rear differential in the transfer case made up the 0.01 ratio difference front to rear. On loose surfaces, that slight ratio difference wouldn't have been noticeable anyway!
Jerry
