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Topic: how good are 351w heads?
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TOPnotch
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Member # 1340
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posted
 
 
I just bought a set of stock 351w heads off a newer 351 roller motor. Does anyone know if the valve size or ports are larger or better? I'm going to put these heads on my 302 5.0 I know I have to get the special bolts with a shoulder fit the larger 1/2 inch bolts. I also know that the 302 GT40p heads that came on trucks were better than stock. I would think the same would go for the 351 heads.
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The bitterness of poor quality remains long after the sweetness of low price is forgoten!!!
1QWKCHP
1QWKDRP
Posts: 2255 | From: Hayward | Registered: May 2002
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Stimson
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Member # 51
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posted
What is the casting alpha-numeric number on those heads?
Posts: 2373 | Registered: Jun 2000
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a50sn95
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Member # 527
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posted
It is my understanding that after 1978, 302 and 351 heads are the same from the factory. GT40P heads are what came in the 5.0 Explorer, and are better than any other OEM head, slightly bettering the GT40 that came on the Cobra 5.0's, due to better exhaust flow. They usually require a special header to clear the plugs, which are at a different angle. Most header manufacturers have these available. I believe your valve size will turn out to be 1.78/1.46. There is some complied flow data on the internet: Click here:
Hope this helps...
Posts: 226 | From: Galt | Registered: Nov 2001
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JohnB
Tech Moderator
Member # 969
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posted
All of the late model 351W heads are the same as 302's..most are even the same casting #'s as the 302 truck heads. "E5AE" is the most common casting..same ones I found installed on my 351W pulled from a 92 Crown Vic.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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TOPnotch
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Member # 1340
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posted
The cast # on my heads are E7TE. Does anyone have a book or any other means to look the #'s up?
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The bitterness of poor quality remains long after the sweetness of low price is forgoten!!!
1QWKCHP
1QWKDRP
Posts: 2255 | From: Hayward | Registered: May 2002
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Stimson
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Member # 51
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quote:
Originally posted by TOPnotch:
The cast # on my heads are E7TE. Does anyone have a book or any other means to look the #'s up?
Those are stock 5.O Mustang heads you have there.
Posts: 2373 | Registered: Jun 2000
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