Flex fan with Vintage Air

[Pistol Pete]

If I get a Derale 18 inch flex fan, will it fit if I use a spacer? I have a 4 core radiator and Vintage Air, so it’s tight. If it will, what size spacer will work?

 

[DirtDonk]

Hard to say.
What year is your bronco?
How many belts? One, two, or three? Or is it serpentine?
What fan is on there now?
What spacer, if any, is on there now?
Got some pictures?