if i were putting this in a front FJ62 axle, Does the E - locked landcruiser diff require the same "notching" as the mini truck axles minus the inner axle shaft mod?
It's a smaller notch than the mini-truck mod, but this is not the right diff for your fj62 axle.
It's a 4.3:1 ratio with 32 spline shafts for a 100 series.