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: what size fan and shroud is the best Big Block Muscle Sep 18th, 06, 10:50 AM Need to know what size clutch fan and how far away from the diameter of the shroud. Also how deep into the shrod should you go to get maximum results......... ------------------------------------------ 67 BB with chewed up shroud. Hi-po SS 454 Sep 18th, 06, 12:28 PM As far as how deep the fan blades go into the fan shroud, is half of the fan into the shround. Thats the correct position but not always made. Stock fans I think are 17 or 18 inches. Big Block Muscle Sep 18th, 06, 6:20 PM Yes ,I was told half the fan into the shroud. Mine ia all the way in. I need a shorter adapter on the fan. This flex fan that is on it is a haf inch from hittting the shroud. Shroud is 19 3/4 inches..... JJ'65 Sep 19th, 06, 12:11 AM Need to know what size clutch fan and how far away from the diameter of the shroud. Also how deep into the shrod should you go to get maximum results......... ------------------------------------------ 67 BB with chewed up shroud. Measure a stock system. few--if any--people can engineer a Chevy better than a Chevy engineer. | ||