which electric fan will fit?

Installed my aluminum radiator in the 72 Demon. Installed the aluminum fan shroud and a 16" electric fan. Whole assembly including radiator must be 7" thick and I only have about 5" to install it??? Hits the front of the fan pulley bigtime??? Anybody been through this issue. Which fan/fans will fit in my demon with a stock aluminum 22" radiator?? Or should I just go stock. Car is an A/C car.......