I was all set in installing the SPAL dual 11-inch fans to replace the viscous, at a whopping 2700+ CFM. Clearance was a big problem, esp. since they share the same center-line.

Independent dual 11-inch fans could fit if they were offset to clear the pulleys. Figure on a max of 4.0-inches at the motor.

I opted for a 16-inch SPAL puller fan at 2380+ CFM, and installed it slightly off-center for better clearance in the factory shroud (pics to come), along with a Derale adjustable thermostat that uses standard 40-amp BOSCH/HELLA relays.

Works like a charm, and doesn't eat all the horsepower of the viscous fan.

:-) neil

PS: I was told a 600SL alternator at 140amps will fit (my next upgrade)