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03-02-2010, 02:11 PM
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CC Member
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Join Date: Mar 2005
Location: Salem WI,
WI
Cobra Make, Engine: classic roadster 302
Posts: 27
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Not Ranked
GT 40P heads
Is anybody using these heads on their 302?
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03-02-2010, 02:35 PM
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CC Member
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Join Date: Nov 1999
Location: Pentwater,
Mi
Cobra Make, Engine: Professional Cobra & Streetrod Builder
Posts: 5,352
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Not Ranked
Many, Many, Many times.
The GT40 P heads come on SVO'S HI PERFORMANCE engines.
Dyno'd at 38 to 45 more hp than standard heads. More than made up for the weight difference!
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03-02-2010, 05:07 PM
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CC Member
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Join Date: Feb 2002
Location: Pearland, Texas,
Posts: 60
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Not Ranked
Using them on my 351. Good heads except the plug location is not favorable to my headers. Plug is too close for comfort. I am using the protective sleeves from DEI and 90* boots for the MSD plug wires that are routed below the headers to the front. Works for now but will be changing heads soon.
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03-02-2010, 05:11 PM
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CC Member
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Join Date: Mar 2005
Location: Salem WI,
WI
Cobra Make, Engine: classic roadster 302
Posts: 27
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Not Ranked
On a classic roadster, do these heads and CRs headers pose any space problems
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03-02-2010, 05:25 PM
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Senior Club Cobra Member
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Join Date: May 2006
Location: Manteca,
Ca.
Cobra Make, Engine: None, sold it
Posts: 2,439
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Not Ranked
I am using them on my 351 with 302 headers and no problem at all.
__________________
Terry
"I may be paranoid, but that doesn't mean they are not watching me"
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03-02-2010, 08:47 PM
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CC Member
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Join Date: Nov 1999
Location: Pentwater,
Mi
Cobra Make, Engine: Professional Cobra & Streetrod Builder
Posts: 5,352
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Not Ranked
As Terry says- no problems.
As boilerat says they can be hard on the boots - don't be afraid do do a little grinding on the edges of the headers to give the wires a little breathing room!
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03-03-2010, 09:56 AM
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Senior Club Cobra Member
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Join Date: Aug 1999
Location: Ellington,
CT
Cobra Make, Engine: Classic Roadster 351W, T5, Red & White
Posts: 3,478
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Not Ranked
DV, the spec sheet on my 351W lists the heads as GT 40 w/ 1.94 intake, without the trailing P, are these two different heads or ?
..........thanks
__________________
2014 Porsche Cayman S, 2014 M-B CLA 45 AMG,
Unkown:"Their sweet lines all but take my breath away, and I desire them as much for their beauty as for their use "
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03-03-2010, 10:08 AM
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CC Member
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Join Date: Nov 1999
Location: Pentwater,
Mi
Cobra Make, Engine: Professional Cobra & Streetrod Builder
Posts: 5,352
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Not Ranked
Don,
Yes, you have the stock heads the "P" heads will have the "P" stamped on the right front side of the head.
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03-03-2010, 11:30 AM
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CC Member
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Join Date: Aug 2009
Location: Edinburg,
TX
Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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Not Ranked
Either the GT40 or the GT40P are both good heads. I think the flow numbers were quite a bit better for the P heads then originals. We ran a set on our limited modified for a while...good set of heads. There on a 351w right now in another limited mod.
__________________
" If it wont break em loose in 3rd gear, it aint enough power "
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