So, if anyone's still reading and interested...I finally got the Rugged Ridge style hubs that I bought off of Amazon, installed and all I can say is they are awesome!
I installed them without incident a week before a road trip from Vancouver to San Diego and averaged 26.7 mpg on 89 grade gas, during the aprox. 2,800 mile trip, with a best mpg of 33.1. I also got 337 miles out of a tank after one fill up.
This is a phenomenal gain as my mileage before the install was around 16 city / 22 hwy.
They fit right through the center caps of my 17' LE wheels and there were no issues with the length of the stock studs.
When the hubs are unlocked the 4x4 console light does come on intermittently, but I wouldn't call that a problem in light of the amazing gas mileage.