Big DAve,
First off...I do not know the answer to your question....however, I have electric fans in my 71 and my 66 Chevelle. My Chevelle uses a Griffin 4 core and aCSI Elctric water pump with dual flexalite fans....the car does not stay cool (hough it wasn't meant to).
When I decided to swap my 350 for the 502 in my 71 I looked at a lot of fans/radiators etc. I ended up buying a "module" from BeCool which was rated for 600HP and included a custom radiator, twin electric fans with shroud, wiring and brackets....it wasn't cheap but I gotta tell ya....I don't have single cooling problem even over the last few weeks where it's been warm (here for us WA folks 90).
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