2V vs. 4V heads
Freshman User
Joined: Feb 2009
Posts: 33
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well the 4V heads have big ports,and the 2V heads small ports and these are suited for street use you can bolt a weiand 8010 4 barrel intake to the head if it is on the 351M/400 were the 4V it is not possible cause the intake ports on the head are too big
Posting Guru
Joined: Jul 2006
Posts: 1,354
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From: America
yeah the ports dont match at all.. they both have different intakes and headers. 4v's are huge and take either big CI or RPM to get use of them and the exhaust ports aren't that good. the 2v heads are a good overall street or truck head.
Posting Guru
Joined: Jul 2006
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From: America
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Numbers matching is a GM thing.
There were no 351M (1975/82) or 400 (1971/82) 4V heads installed on US/Canadian assembled cars/trucks.
The only carb available with these engines was the 2V.
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Posting Guru
Joined: Jul 2006
Posts: 1,354
Likes: 1
From: America
i was going to say the same thing about 2 barrel 400 but i didn't know what engine he has.
