Dayton makes blower fans, small medium and large, they operate with the barral fins. Seems like you take the motor off, mount a pully outboard of the carb, stick it ontop the carb, and it would force air. We use small 1's at hunter for boot rack dryers, there rated for 100 CFM but, they sell blowers up to 2000 CFM, which any could be increased as, most all of them operate at or around 2850 RPM which by increasing the RPM, you increase the CFM.