Thanks to everyone who replied to my question! While testing some fixed factory fans, I discovered something interesting. When the blades are evenly spaced, the fan roars like a blast furnace at higher RPM. When one or more blades are offset, it is very quiet. Now I know why they staggered them! Any downside to fixed, aftermarket aluminum fans? Sean ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.