I'm running a 78 Dana 60. Beat it death at the dragstrip with no issues, and running stock parts besides a locker and Yukon gears because I kept the 3.73s in the rear.
New personal best of 7.69 @ 90.56. 1.74 60". Truck dynoed 657/1125 Thursday before Scheid. Pretty happy with the weekend, but am fighting a tranny issue, converter and 4th gear issues.
6900 lb race weight. 12.20s-12.30s in the quarter and 7.7s-7.8s in the 1/8. I'm fighting low rail pressure 27k desired to 22k actual and a flaring transmission in 4th gear. Pretty happy with the results.