I ran an EZ locker in the rear of my 10 bolt and 36" Swampers (talk about askin' for trouble) and never had a problem. Ran it that way 2 years wheelin', towing and daily driver. Would I recomend it? Nope. EZ locker is the cheapest by far, even Lockrites being about $150 more, but I would save for a detroit. I know of one Willys out here running 36" tires on dana 44's and he runs nothing but hardcore trails and he has had no problems. I think it's the weight thing to be honest. But I would save for a detroit. It will upgrade the traction and the diff strength immensly. (Stronger carrier).
"You're right... I don't understand that Jeep thing!"