thanks for that
this pump here:
http://www.ebay.com.au/itm/NISSAN-SKYLINE-STAGEA-LAUREL-WATER-PUMP-R33-R34-C34-NEO-RB25DET-RB25-GENUINE-N1-/320939120027?pt=AU_Car_Parts_Accessories&hash=item4ab976559b
claims:
Updated design from earlier RB25 water pumps, narrower casting speeds up
coolant flow, no slotted bolt hole for best seal.
is it actually better than the older design?