I've found a 60 with 4.10's and a detroit in it. But I'm going to run 5.13's. Will I have to replace the carrier and locker or can I just bolt a 5.13 ring gear to the carrier already in place. I'm a total newbie when it comes to 60's. Are they anything like the 14ff where I can use the 4.10 carrier and get thick gears. Having the locker is a main selling point but if I have to toss it, then the deals not really worth it. QUESTION #2: whats the difference between standard and reverse rotaion? is standard for front 60's and reverse for rear?