I've read numerous posts on other boards of people raving about how great the 3.8L Taurus electric fan is.
So I picked one up for $25.
Installed it. Played with it. Hooked up two 30amp relays in parallel to switch it on, and used a manual override under the dash, and a keyed-on temperature switch to automatically operate the fan.
I can report that it did an fine job cooling my built 392 around town, and did OK for the first hundred or so miles of mostly flat towing.
It didn't do well in Yellowstone on long slow climbs, or Wyoming on the other side of the park.
This, with a freshly recored 3-row rad, RS 180 stat.
At Willy C's, I removed the air conditioning and auto trans coolers from the grille area (AC doesn't work, and the front clip is from an auto truck, now installed on my stick truck).
Don't think that made much improvement, but propping the rear of the hood open did seem to help. I did this by adjusting the hood hinges on the '74 pickup as far as they'd go, pushing the rear of the hood UP.
Definitely improved hot air flow out of the engine bay.
Still liked to get hot climbing hills with 90-100 deg ambient temps.
I killed the 392 on the second day, just before RMIHR.. after RMIHR we swapped in a stock 392.
The Taurus (and cocked-open hood) did MUCH better with the stock motor, with similar temps.
I only stopped once to let the engine cool, pulling Fremont pass into Leadville, CO.
Otherwise, the motor ran 200-220-ish (lost my mechanical gauge when swapping motors) at 65-75mph (3000 to 3500rpm) at 14-15,000lbs with ambient temps between 90-105 (Moab, UT was in the "low 100s".. )pulling grades and on the flats for 900 miles through the Rockies.
I need to get the correct tranny mount into my truck, and then I'll look at using the deep 74/75 shroud I have and put my clutch fan back on.
I might keep the Taurus fan at the same time, for use when idling in traffic, or for cool-down at fuel stops, but I think I need to go back to the mechanical for primary cooling purposes.
I don't want to put the fan in front of the radiator (pusher), because I need the room for the A/C stuff.. and with the 74/75 engine set-back, I can JUST get the Taurus fan AND clutch fan in place.
If I upgrade to a 4-row, I'll have to have the mounting flanges offset to put the rad forward a bit, to keep the clutch from hitting the electric fan motor.
Note that the Taurus draws ~40amps when running.. I upgraded to a Delco 12si 94amp alt at the same time, and 4-gauge charge wire, just to make sure I could keep up.:D