I had the same issue with my Northern Radiator in my '66 and running a 5.0 Fox serpentine system.
I found a stock rubber hose at Advance Auto and cut it to fit. It comes out of the radiator, and turns downward immediately. It clears with about 1" to spare, if I remember correctly. I'll get the number and post it later.
1995 GT convertible - Laser Red
1995 GT convertible - Black (Son's ride)
1966 GT Fastback under restoration- Code T Red
with White LeMans stripes.