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Old 02-23-2008, 06:13 PM   #49
3150Mach1
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Join Date: Apr 2005
Location: Charlottesville, VA
Posts: 13,678
Re: Head differences

Quote:
Originally Posted by Cooldbz12 View Post
Wondering this 2, my mach has a built date of 11/02.. but has the blue paint does this mean ford fixed the ticking noise on it and do i have the 4 thread or 9 thread spark plug holes?
According to Dan it means the heads have replacement guides and are 4 thread.
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