I have a '72 vert with a 8.9 CR 455 that is an original 350 car with a stock 3 row radiator. I originally used a stock 7 blade fan with a Hayden severe duty clutch and it would get hot in traffic and was ok on the highway. I switched to a 7 blade 19" Flex a lite flex fan and the car will not get hot regardless of the outside temp or traffic. On a 95 F day it might get to 175-180 F max. I had a 160 F T-stat in it and I switched to a 180 F because it wasn't getting warm enough. Not suggesting people should use this, set-up just offering my personal experience.
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1967 Firechicken, 499", Edl heads, 262/ [email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule.
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