There have been many many threads on this topic. A 19.5" 7-blade clutch fan is what you want. However, it will be basically worthless without the shroud, 400 X-fillers, lower baffle/filler, rubber fillers that direct the air through the rad not around it etc. ALL factory/stock cooling parts & pieces must be in place on these cars or they WILL run hot! Also, a stock 180* stat as well. If ALL of these components are in place and your timing is correct, good water pump, correct pulleys etc. you car will not overheat...