Hold on with the Dana 60 argument. A FRONT Dana 60 see`s a whole lot different loads then a REAR Dana 60.
A rear Dana 60 is 95% of the time a 30 spline full float axle. Even the Dana 60 HD. Not much of an upgrade till the shafts are changed to 35`s. Which means boring the spindles out for clearance of the 1.5 diameter shafts. Even aftermarket 30 spline chromo shafts are not much of an upgrade. You need to go to 35 spline to see any appreciable strength increases.
For the money of the new shafts and boring/replacing the spindles. Plus a 35 spline carrier on the REAR Dana 60. Go to a STOCK 14 bolt. Gain even more strength for a hell of a lot less money. Sure you will drag it over everything but even that can be fixed cheaply.
A FRONT 60 see`s less load then a rear.....Remember it is easier to pull then to push......Why you see 14 bolts in the rear and 60`s up front. Or
AMC20 `s in the rear and
Dana 30 `s up front.
The main advantage of the FRONT 60 ......even with the 30 spline shafts........is the larger U joint. Larger then the 30`s 260x, newer 30`s/44`s 760x. The U joint and the ears of the shaft is by far the most common area of failure.
Have to be careful that when talking of axles we compare apples to apples.
I still stand that the OP could use his
AMC20 with a few upgrades/Ford 8.8 with a few upgrades in the
REAR.
A
Dana 30 with aftermarket 760x shafts up
FRONT.
A HP
Dana 30 would be a good upgrade but all the HP`s are driver drop. Retubing an HP 30 for passenger drop would be a waste of money.
An argument could be made that a 44 would be an upgrade. Even though the 44
would use the same shafts as the newer/upgraded 30. Bigger, thicker axle tubes, larger ring/pinion gears. Heavier duty inner C`s and knuckles. Spindles, brakes etc.
Hopefully this clears up a few things.