So you've got a set of 1:4.10 diff gears coming in, not 1:4.11? you could maybe get away with it, the difference is very minor, just don't engage 4wd on any hard surfaces!! If I were you I'd match them front and back to avoid any potential transmission failure which can quite easily result if your ratios are different. Put the 4.10s front and back. That's my 2 cents. What are the 4.10s from, a 70 series?? Aftermarket gears??
4:10's from a 62. Both already locked and front have CM Birfs. I was only looking for a disc brakes swap, but I think it would be stupid not to change out the whole axle since there are so many extras already installed.
Anybody know if I can keep my full floaters in the rear? Don't know much about all of this.
There's no problem running a 4.10 with a 4.11. Yes there will be binding, but no more than it will see when you turn while in 4wd. The front axle always travels a longer distance than the rear in a turn, and no one unlocks their hubs just to turn...