I was thinking the same thing about the size of the fans but if you do 15" X 3.14= 47sqin(approx what I have now) and then 2x (12" X 3.14)=75sqin(approx). Seems like quite a bit more surface area getting flow with two smaller fans. As long as they were in a well fitting shroud for the core I think it might make a significant difference. Can't be sure without a trial. But math usually doesn't lie.
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Robert
69 Firebird-462/Edel round ports/currently running the Holley Sniper/4sp/3.23posi/Deluxe Int/pwr st/vintage air/4wl disc( a work in progress-always )
http://youtu.be/eaWBd3M9MN4
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