Talked with Spal today. These guys are very helpfull! The tech guy said with my radiator dimentions the way to go would be two 12" inch high performance paddle blade fans with the 165 off 185 on sensor and relay. This would put out 3200 cfm. I asked if having one 16" fan would be better and he said no! He said I'd get my CFM's with the two 12" fans. Glad I called them! Gonna cost a bit!