Thanks for all the input... just to close the loop in case anyone is searching on this topic.
The following fits on the Factory Spare Tire Mount with a stock bumper (Just Barely):
Wheel: Stock 17 inch Alloy Wheel
Tire: Toyo Open Country M/T 295x70x17
The extra weight of the larger Spare (about 90 lbs for 10 ply) is noticeable when swinging the door open or closed. If you throw the back door open you'll know when it reaches the end of the door lock... there is a thud :-).
picture can be seen at my blog:
LastGreatRoadTrip.com
Thanks again for all the input.