Hy LevisPop, the 49 axle has a different part number than the 46 axle. The steering knuckles (spindles) are the same as are the kingpins and wheelbearings, also the plain steering arm is the same, I hope you find usable bearings and a better steering knuckle. The axle may indeed bolt into place, but the fact that the part numbers are different indicates that there is a difference between the two axles, hope that helps.
