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» Northern California Ford Owners     » Automotive   » Tech Talk   » How to I.D. GT40P heads?

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Author Topic: How to I.D. GT40P heads?
hidnn.o.s.
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Motor is in the car and running, how can I I.D. them from popping the hood?

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R.I.P. Willie G. You are missed on this forum

Posts: 15950 | Registered: Apr 2002  |  :
1FAST89GT
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is it for that drop? it should say gt40p on the outside of the head if i remember also look at the spark plug angle there are different on gt-40p heads then others
Posts: 4915 | From: VALLEJO | Registered: May 2004  |  :
crazyhorse
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the outside of my heads only say GT. how can i tell which ones they are by the spark plug angle?

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1965 Mustang coupe

Posts: 761 | From: Bay Area | Registered: May 2005  |  :
92coupe
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you can try feeling the back of the head for the 4 raised lines. 3 if they are regular gt-40's.

Justin

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94-GT BLOWN & STROKED

Posts: 1209 | From: antioch | Registered: Oct 2002  |  :
hidnn.o.s.
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quote:
Originally posted by 92coupe:
you can try feeling the back of the head for the 4 raised lines. 3 if they are regular gt-40's.

Back of the head? Sal said to look for the 4 bars on the front of the head behind the alternator? All help is appreciated.

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R.I.P. Willie G. You are missed on this forum

Posts: 15950 | Registered: Apr 2002  |  :
JoeT
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off the top of my head (I'm sure google will correct me)

E7TE casting under valve covers = heh stock 87-95

F77E under valve covers = GT-40P ftw

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1984 Ford Tempo AOD--- RIP

Posts: 6785 | From: San Jose | Registered: Jun 2001  |  :
hidnn.o.s.
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Don't have access to removing the valve covers, taht would be too easy.......

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R.I.P. Willie G. You are missed on this forum

Posts: 15950 | Registered: Apr 2002  |  :
Blind
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quote:
Originally posted by hidnn.o.s.:
quote:
Originally posted by 92coupe:
you can try feeling the back of the head for the 4 raised lines. 3 if they are regular gt-40's.

Back of the head? Sal said to look for the 4 bars on the front of the head behind the alternator? All help is appreciated.
they were on both front and back on mine, and I think the gt40p's have GT stamped on them next to one of the headbolts at one end

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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi

Posts: 8521 | From: Fairfield | Registered: Jul 2003  |  :
92coupe
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quote:
Originally posted by hidnn.o.s.:
quote:
Originally posted by 92coupe:
you can try feeling the back of the head for the 4 raised lines. 3 if they are regular gt-40's.

Back of the head? Sal said to look for the 4 bars on the front of the head behind the alternator? All help is appreciated.
i may be mistaken which side the head they are on but it takes what 2-3 seconds to feel for them. probably the quickest and most definate way to tell what heads they are.

Justin

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94-GT BLOWN & STROKED

Posts: 1209 | From: antioch | Registered: Oct 2002  |  :
Luke87GT
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very simple.

Look for the elevated stripes/bars on the front of the head. If they have 3 bars, they are gt40's. If they have 4 bars, they are gt40p's.

Good Luck

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Stangless

Posts: 7802 | From: San Mateo | Registered: Jul 2000  |  :
BlueOvalRacing
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Even more simple - look for the p next to the pass. side valve cover, or the GTP letters by the front lower head bolt on the same side.

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Posts: 1159 | From: Pioneer | Registered: Jul 2002  |  :
HaulinAss Motorsports
Its a STREETRaceCar!
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quote:
Originally posted by BlueOvalRacing:
Even more simple - look for the p next to the pass. side valve cover, or the GTP letters by the front lower head bolt on the same side.

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yes but he stated the car is running,with the header,a/c lines,smog lines etc.. in the way you WILL NOT see that csting.

Easiest way is what was mentioned before and that is

4 raised casting lines GT40P
3 raised casting lines GT40

[patriot]

Posts: 22494 | From: Sacramento | Registered: Nov 2001  |  :
166 Merlo
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just look at the spark plug angle, it's almost perpendicular to the head

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'89 - Boss Coupe
'70 - Drop Cutthang
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Posts: 3954 | From: Thebay | Registered: Jul 2002  |  :
BlueOvalRacing
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You can easily see them in the car with all the accesories. The A/C is on the other side, and the smog pump lines will not get in the way of either marking.
Posts: 1159 | From: Pioneer | Registered: Jul 2002  |  :


 
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