There is only 1 pump listed in etka (not that this always means anything!), but there are several different pullies listed. All the brackets have the same part numbers 8v/16v, so the difference is not those.
In fact the early 16v has the same pully as the 8v, it changed on chassis # break F1G-MW240 001/MB075 001
early kr pulley is 027 145 255, late is 051 145 255. I think the difference is when the slipper pulley on the waterpump was introduced/dropped? Cant remember if it was the early or late KRs that had them.
do you have the old bracket to check the part number, and is there one on the new bracket?