New Dana 60 Help please

What will it matter when the 7 1/4 breaks?

Exactly. What people forget when they try to make the argument about a bigger, heavier rear end is this.....The larger diameter the ring gear, the more leverage the pinion has to turn it, regardless of ratio. That's always lost in the discussion. You'd be hard pressed to tell the difference between a 7 1/4 and a Dana 60, all things being equal.