Fox Anyone know what heads these are

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General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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polk county florida
Gt40 have 3 vertical bars on the end of the head
gt40p have 4 bars and a different plug angle
gt40x are aluminum they have a FORD logo on them I think.
 

nickyb

WAIT,you now have a pair?
5 Year Member
Apr 3, 2009
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nevada
But seriously did you pull valve cover and get some numbers?
 

Mustang5L5

i'm familiar with penetration
Mod Dude
Feb 18, 2001
33,322
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Massachusetts
I think the stamping is just a Serial Number.

Is the stamping the same on both heads, with a -1 on one and a -2 on the other?
 
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