Can you tell me the aluminum 7-blade fan part #? I have an original fixed blade 7-blade steel fan cooling my big block with 180F stat and 2-row Griffin 26" radiator. it stays 185-190 almost all of the time. However, if I'm idling in traffic longer than 15 minutes, which does happen occasionally, the engine temp will start to rise past 200. What surprised me is that I was stuck in a complete traffic jam dead stopped for 25 minutes and the temp rose to 230. I'm wondering if the aluminum 7-blade clutch fan at idle would keep it cooler. Not sure if the pitch could be different or maybe aluminum spins more freely being lighter weight?
