Flex fan
Here they are stuffed into my A-body, before I got the Autocoolguy PWM controller to better use them.
Electric dual fans from a Ford Contour (the second pic must be someone else's since the inlet and outlet are on the opposite sides from mine!) They keep my 451 and inexpensive 3-row aluminum radiator cool enough in low-90's weather (anything more and I am too hot to drive) :)
Here they are stuffed into my A-body, before I got the Autocoolguy PWM controller to better use them.