Electric VS standard fan

The radiator does not fit into the cutout in the radiator support and therefore is mounted on the back of the support and has only 2.5" clearance to water pump pulley.

I still dont understand this part....Can you explain a little? Take a couple pics to show how your radiator is mounted to the car... 2.5" inches from the water pump pulley to the radiator's core seems really close, it shouldnt be...how thick is the radiator?

I have a new Champion radiator--also new (with spring) lower hose--motor is fresh 340 with 4 speed and A/C, problem is not enough clearance between water pump snout and radiator to install factory fan. I've looked at every thread on every website and have come to the conclusion that I'll need a smaller radiator and go back to factory fan with shroud. Tried 2 or 3 different thermostats and even different size restrictors. Also have remote temp gauge in engine compartment that I verify with temp gun--they always match. Anyone want to trade a factory radiator for my new Champion radiator?

do you have a part number for that exact radiator so we can look it up and see what the deal is...

are you using the factory k-frame, is the engine in the original location?