I ran two fans off a mid 90's GM something or other, Gran Prix I think, 4 dr POS car, 3.1 was the motor.. they were pullers from the facotry, I ran them as pushers on my 300/6 Bronc, very happy, and pushers on my 6.9.. very happy.
That truck later suffered a Headgasket.. but I was not with it, so I can't finger the fans.
Cooling system mods to that truck were the pair of efans, a 6.5 Radiator.. and thats all.. I towed 0-6,000 all over the Valley, climbing not climbing, stop and go etc. no problems, never more than a third of the gauge.. I loaned to the former owner.. and he smoked it pulling a 4 horse with 3 horses and two half horses (colts) in it 180 miles one way, flat and mountainous.
Fans?
Not the Fans?
He also smoked his 460 on the same run 6 months later.
Friend of mine who picked it up said it was minus all vital fluids... cept fuel.