The ABS unit is as old ford says a stand alone ABS ECU, I am not sure if I still have mine knocking around. When I did mine I did do away with the ABS and then still used the accumulator pump and master cylinder etc. so it was a standard 4x4 system but just the abs ECU and valve block removed (I originally had it with ABS though)

I wouldn't bother with ABS either. You want to use what Peter Wheeler said about my Cerbera "SRF" (Sensitive Right Foot)