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Old 03-08-2009, 02:20 PM
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2V vs. 4V heads

Is there any real difference between 2V and 4V heads? I was told that it was just for numbers match ,but how do the ports match?
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Old 03-08-2009, 03:57 PM
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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
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Old 03-08-2009, 04:47 PM
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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.
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Old 03-08-2009, 05:05 PM
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i'm bored today so i took a pic of my PME 4v adapter plates that i dont have a use for vs the port on my 1st set of junk 2v aussie heads i have taking up space..

Click the image to open in full size.
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Old 03-08-2009, 06:26 PM
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I am also bored,measured mu edelbrock 4v manifold ports,which turned out to be smaller than the ports on the heads-2&1/4 compare to 2&3/8".Maybe my
"2V" heads are 4V??
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Old 03-08-2009, 06:42 PM
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my edelbrock 4v performer is much smaller than the ports on the heads...ill post a pic. the 2v heads are 2 1/16" from top to bottom and the 4v are 2 7/16".
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Old 03-08-2009, 06:48 PM
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Click the image to open in full size.
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Old 03-08-2009, 06:52 PM
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Quote:
Originally Posted by gearhed1971 View Post
Is there any real difference between 2V and 4V heads? I was told that it was just for numbers match ,but how do the ports match?
There are no VIN's or serial numbers on Ford mechanical parts.

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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Old 03-08-2009, 06:58 PM
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Quote:
Originally Posted by NumberDummy View Post
There are no VIN's or serial numbers on Ford mechanical parts.

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.
i was going to say the same thing about 2 barrel 400 but i didn't know what engine he has.
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Old 03-08-2009, 07:33 PM
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Yes,it is a 400.Its a 2V carb,original.Its listed on craigslist,but a guy who's interested said that he was hoping it was a 4V engine,but I guess that's not possible?
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Old 03-08-2009, 07:34 PM
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not stock 4v...the only way to put 4v heads and intake on is to use the plates like shown in my pics
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Old 03-08-2009, 07:40 PM
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Which heads do you use for the 4V setup,something aftermarket?
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Old 03-08-2009, 07:51 PM
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you can get aftermarket 2 v intakes to go with the 2 v heads so you can run a 4 barrel carb.
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Old 03-08-2009, 07:54 PM
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So,there is no actual 4V head?
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Old 03-08-2009, 07:56 PM
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Sorry,brainfart there
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Old 03-08-2009, 07:56 PM
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