Sounds like your dad was on the right track.Does it keep the engine at operating temp?If so maybe the only problem is mounting it better.Why an electric fan? I have found over the years that if you have a properly mounted radiator,and a good shroud,you dont need an electric fan.Surely you can figure out how to better mount the radiator,and also install a shroud.I see way to many streetrods rigged up with electric pusher fans and the fan sitting back about six inces from the radiator. When I first installed a 350 engine in my 55,it ran a little on the hot side,and yes it also had an electric pusher fan on it. I took the pusher fan off and installed a shroud behind the radiator and the truck now runs about 30 degrees cooler.Just something for you to think about.