I've got a 12 bolt underneath the rear of my 81 Blazer and I'm trying to find some options for locking it up. I priced out a Detroit from a local auto parts store and they quoted me $1072 after tax. My truck sees some fairly tough offroad duty but is also my daily driver. I'm looking for a way to lock it up that'll withstand future mods and more wheeling but not cost me an arm and a leg. Any ideas? What are my best options? Or should I just bite the bullet?