I was in the JY today and I found a GM axle with no other identification. I know it wasn't a 14b, it had drum brakes, didn't have ABS, and may have been a 10 or 12 bolt. Would doing a 10/12b swap be worth it? What kind of locker options do they have? I'm running 33's and MAY go up to 35's but that's the upper limit. Right now I have the 30/8.25 combo.