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#6 |
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Join Date: Feb 2014
Location: Lakewood Washington
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The fourth position in a Ford casting is a "group" ID. Z is factory replacement and E is "engine group" (original part).
F1ZZ and F1ZE should be the same head. F - '90s 1 - 1st year of 90's Z - Mustang '91 Mustang cylinder head. This might help. https://www.enginelabs.com/engine-te...sting-numbers/
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Dale Shearon 68 Mustang 6394 |
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