Pulled the drums off another 14BFF tonight and all was different than the last 5. This one had a spindle nut that was twice as thick as normal, a key stock peice in the key way and a retainer clip to hold the key stock in. Never seen that before. So I get the drum and brake parts off and went to put on the disc brake conversion. Won't go on, turns out there are crimp markings (something like that) on the spindle behind the machined area. Looked like a three jaw chuck had bit into the steel leaving burs behind. Once they were smoothed off the brake conversion went right on. Just when you think you've done something enough times you can do it in your sleep, GM throws a curve ball at you.