Small block Water Pump

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I have a .040 over 340 with J heads that have 2.02/1.60 valves with a Be Cool radiator.

I put an AC water pump on it and have heating issue. Also had a large underdrive water pump pulley which has been changed.

This is what i found out,

FACTORY AC CARS HAD 6 BLADE with smaller water pump pulley to speed air flow thru the radiator and Non AC had 8 blade & larger pulley so the water flow thru the engine is the same on an AC car as on a NON AC

I'm going to switch to a 8 blade high flow pump, even though I have AC on my car, also have electric fan so no need to worry about fan speed.