You have antilock braking in your car. It was standard equipment.
The e30 half shafts you will be installing will need to be from a e30 that had abs. The way you can tell is an extra set of splines near the wheel side of the shaft, as seen in this pic (it compares the ABS section on the two halfshafts):
As far as part numbers go for bearings. Look them up on
RealOEM.com.