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Gt40 Heads with Crane Cobra roller rocker

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Old 04-06-2012, 12:24 AM
ian_ak ian_ak is offline
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Gt40 Heads with Crane Cobra roller rocker

wondering is a Ford motor sport X 303 Roller cam and Gt40 Heads with Crane Cobra roller rocker out of a 2000 ish 5.0 mustang would fit on my 1973 351 windsor? If so would this be a good set up for a truck? any info would be great. thanks for your time.
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Old 04-06-2012, 08:06 AM
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Originally Posted by ian_ak View Post
wondering is a Ford motor sport X 303 Roller cam and Gt40 Heads with Crane Cobra roller rocker out of a 2000 ish 5.0 mustang would fit on my 1973 351 windsor?
Head bolt holes have to be bored to 1/2".. which is no big deal, and then they'll bolt on. The cam will also go in but you will need retrofit roller lifters(link-bar) and custom pushrods.

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If so would this be a good set up for a truck?
No.. the cam is a bad mismatch for those heads on a 302 so it's an even worse match for a 351. My suggestion would be to substitute a flat tappet cam such as the Comp 35-234-3(so you don't need the additional roller parts) and sell the X cam to some other car guy.
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Old 04-06-2012, 03:12 PM
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The GT40 heads will bolt on, but you will have to address the intake's extra bolt holes in the coolant ports if you plan on using the 73 intake. Then there's the question of the "2000-ish 5.0 from a Mustang" ? Last year for a pushrod 5.0 in a Mustang was 1995.
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Old 04-06-2012, 05:18 PM
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Then there's the question of the "2000-ish 5.0 from a Mustang"
Ha.. I completely missed that one. Yeah that could throw a monkey wrench into it, if it was a Y2K 5.0 it was from an Explorer/Mountaineer and that means those are P heads which are better performers but make fitting headers more "interesting". Or it could be that it was a Stang but the seller didn't really know what year it was and simply took a WAG at it.
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Old 04-07-2012, 02:22 PM
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ok thanks guys. i think i might go with a different rout. do you know what year of cobra heads would fit my 73 351 windsor and if i will be able to run the same exhaust manifolds and or headers .
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Old 04-07-2012, 02:44 PM
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how about a set of gt 40p heads from a 95 5.0 mustang
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Old 04-07-2012, 02:51 PM
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how about a set of gt 40p heads from a 95 5.0 mustang
The "P" heads came out in mid 97, so a 95 Cobra 5.0 should have the std GT40 iron heads. And with these particular heads (Cobra only) you need to watch how much you mill them, if that needs to be done, Ford gave them an extra pass on the milling machines before assembly to minimize the chamber volumes.
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Old 04-07-2012, 03:08 PM
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ok so will these heads will need to board out to 1/2 heads bolts also and will they have the extra bolt holes in the coolant ports ? i am will be running a edelbrock 351 w street performer intake. does that make a difference ?
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Old 04-08-2012, 08:39 AM
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ok so will these heads will need to board out to 1/2 heads bolts also and will they have the extra bolt holes in the coolant ports ? i am will be running a edelbrock 351 w street performer intake. does that make a difference ?
If they're iron GT40 heads off a 302, they will need the bolt holes drilled to 1/2". They do not have the extra bolt holes in the cooalnt ports like the 69-76 Windsor heads did. Your Performer intake lacks these extra holes too, so you're fine there.
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Old 04-09-2012, 12:26 AM
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thanks for all of the help. it is looking like i might be putting a set into my 351 windsor. i sure hope they will be a good upgrade.
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