The antilock brake system on these trucks and many years after worked off of the speed sensor(vss) on the rear output of the transmission(2wd) or transfercase(4wd).There are no other output sensor(s) on the rear axle itself. This holds true on the current models(04) as well.The 4wheel antilock brake system in also uses the VSS for the rear wheel antilock signal but in addition it also has a sensor on each front hub as well. To answer your question you can put any axle you like and it wont effect the antilocks per say except that for the system to work properly it is generally recomended that the final ratio be kept within a 10 percent variance of original, so gear ratio changes and large tire size differences require recalibration. You would need to play with the proportioning from front to rear because the 14bff has 13 inch brake drums and the 10 bolt has 10 to 11 inch drums.
