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?

 

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

 

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.

 

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..

 

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??

 

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".

 

 

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.

 

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?

 

not stock 4v...the only way to put 4v heads and intake on is to use the plates like shown in my pics

 

Which heads do you use for the 4V setup,something aftermarket?

 

you can get aftermarket 2 v intakes to go with the 2 v heads so you can run a 4 barrel carb.

 

So,there is no actual 4V head?

 

Sorry,brainfart there