Use a factory fan from a 240SX... it's the same thick white plastic as the Z fan, but the diameter of the fan isn't quite as big... It should fit and still outflow any electric fan out there. It may require using a 240SX fan clutch, but I believe the bolt spread patterns where it bolts to the water pump are the same... at least it looks like it to me. I have a 240SX fan and fan clutch out in the garage I can go out and do some measurements if anyone's interested.