Until the head gasket took a crap, SidewaysMotorsports rally car worked awesome with twin 12" pushers in the front of a PWR. We have one wired to a manuel switch and the other to the stock fan switch in the corner of the radiator. On the other note, I have a really good deal on a 1/8"x4'x8' piece of tread plate aluminum (ie "diamound plate")
Later,
John