If one is good, two are better, right? Such logic may not always hold true, but there's something to be said for a pair of electric fans pulling air through your radiator. The folks at Old Air Products certainly think so. They felt a double dose of sucking power was a good solution for hot-running '67-72 Chevy and GMC pickups, so they developed a bolt-in kit specifically for the application.
Actually, you don't need to wait for an overheating problem to benefit from a dual-fan setup like this. For starters, many truck owners prefer electric fans because it doesn't take any horsepower to run 'em. Furthermore, they can be lifesavers in heavy stop-and-go traffic because they don't rely on engine speed to draw large quantities of air through your radiator. The skewed-blade design of the Old Air electric fans allows them to provide approximately 2100 cfm of combined flow for maximum cooling capability. This particular setup is designed to have one fan running whenever the ignition is on, with the second fan kicking in at a given radiator temperature that you determine. With the addition of a trinary pressure switch (sometimes requiring an adapter), the second fan can be hooked into your OEM or Old Air air conditioning so it will kick on whenever the A/C is running.
We recently watched as Alan Crouse installed an Old Air fan kit on a '71 Chevy belonging to Jim Ries at Classic Performance Products. The whole procedure literally took about an hour. The fan assembly bolts in place using the original fan shroud mounts, and wiring is a simple matter of securing two power wires to the positive battery terminal, routing one to the fuse box, and grounding another. Our particular truck didn't have A/C, but hooking the fans into an A/C system should be a straightforward affair as well. See what you think.