Thanks for your input. I however am a crawler, skill or finesse is my style of wheeling. I don't "Hammer" .If I was in your situation I would go with the Dana 60. I have the 8.2 in mine and the way I wheel it`s only a matter of time before I am replacing another R/P and or bending the rear diff. No way would I do the HP rock jock unless your into replacing the R/P, do a little research you will discover it`s really not your best bet. The Ford 9 a good choice with the third bearing for support but they are not as efficient in rolling resistance, they have more drag or rolling resistance. If one goes to trueHi9 they have a real good photo comparison of various ring gears. One option is if you wanted one diff that you could really hammer on and not worry about, however you would have to do away with your rear ABS would be ECGS 14 Bolt option. Now that thing is sexy.