Congratulations Mule!
You literally hit the lotto!
I have been in that unit looking for sheep but I've never hunted it.
My daughter lives in Grand Junction so we have been down a time or two for a look.
From what we saw, I am thinking 150+ ram is a good ram in that unit, but I think there are quite a few sheep that you could look over. The unit seems diverse with some private land, places you could actually almost hunt from your vehicle to some areas you could backpack into.
Regardless you should have a great time and you should also be able to find a nice ram. If it were my tag, I'd absolutely take as much time as I could and make the very best of a Once in a Lifetime adventure.
Keep us posted!