At what point to go Dana 60 ??????

a factory dana is 50 pounds heavier than a factory 8.75
True, but if you put 35 spline axles in an 8 3/4,(same as most factory Dana) that weight difference Is cut in half. The 25 pounds difference is in all the right places to make the Dana superior strength wise.
That weight difference has not been proven to hurt vehicle performance with some people reporting faster et,s with the heavier Dana. The Dana also has a superior pinion gear efficiency height that uses less horsepower to turn.