Factory cars did not overheat when they were new. The A/C package is tough to beat.
It is not exact to your application but...For a 440 B body with NO A/C, the lower pulley was approx. 7 1/4", the WP pulley (Single groove) was around 6".
For the A/C setup, the crank pulley is smaller....about 6 5/8" and the WP pulley is really small, like 5 1/8". The BB does use a different WP for A/C or NON A/C though.
I use a Flowkooler pump, an ECS/Speedcooling aluminum radiator, 26" core, 2 rows of 1 1/4" tubes, a fan shroud and an 18" fan on a Hayden 2749 clutch. I still run 195-205. I'm okay with that.
