I have an 1986 Chevrolet van with a 358 engine and I mounted the electric fan in front of the radiator and it works fine.
I did have to remove one bracket that holds the center section of the plastic grille.
This fan is a single blade and not a double blade.
The 350 engine was bored with a Comp Cam and a few other trick parts including new heads and headers and an Edelbrock Carb.
The old 305 needed heads and the 350 had just come back from the machine shop after being bored and everything from the bottom to the top was new including rod, pistons, rings, bearings and heads.
It was sitting on an engine stand so I thought what hell let's use that instead just getting the heads redone for the 305
My 1986 van is my work truck and looks brand new once I painted it and changed the complete interior and got a nice set of rims from Jegs.
I prefer driving something older rather then something new.