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What is the Correct 427 FE SO Radiator Cap? What is the Correct 427 FE SO Radiator Cap?
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Old 02-25-2004, 11:06 AM
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Default What is the Correct 427 FE SO Radiator Cap?
What is the correct radiator cap for a 427FE SO?

AMK Products makes two versions. One that says S.M.C.O. 14# and another that says Autolite 13#.

http://amkproducts.com/radiator_caps.asp

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Old 02-25-2004, 11:19 AM
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Zinc plated S.M.C.O.

the higher pressure rating is also desirable

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Old 02-25-2004, 11:54 AM
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Autolite 13#, the expansion tanks can't take much more pressure than that (13 lbs). If not running the old style expansion tank you can go up with a higher rated cap.
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Old 02-25-2004, 01:35 PM
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Thank you Bud Man and Eliminator. I am running the original tank and the cap I am replacing is 13# but just generic so I want one that is more authentic. I guess that will be the Autolite.

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