I have 1971 Mustang with a 351-2V. I want to convert to a 351-4V. Is this accomplished by just swapping out the 2V manifold and carburator for 4Vs, or is there more to it? Is this ask advisable for a novice?

Thanks in advance for your help.

 

4bbl C's have different heads. Larger ports and valves. This wasn't good for street manners if you are still 351ci, maybe ok with 400+.

The best options are to just put a 4bbl aluminum intake/carb on your car and it will run better. If you have some more money laying around get some closed chambered 302 aussie heads and the 4bbl route and you should gain some good HP. Next would be a cam swap.

 

Edelbrock makes an aluminum intake for the 351 Cleveland with 2 barrel heads. It allows the use of a 4 barrel carb with the smaller intake ports that match the 2 barrel heads. Here's one on ebay right now....

http://cgi.ebay.com/ebaymotors/Edelb...spagenameZWDVW

This is in my opinion the most bang for the buck. Dean

 

yup, sticking with the 2v heads and using a 4v intake designed for the 2v heads is the best route for a streetable motor

 

Thanks for all of your help!

Is this something for an "engine rookie" to attempt?

 

If all you are doing is putting on a four barrel on your existing 2V motor, then that should be pretty straight forward. Even changing out an intake is pretty easy. If you are planning to convert your heads, that will get more involved and may get over you head if you do not know what you are doing.

 

If you decide to rip off that 2v intake and carb and replace with a 4v intake and carb, get it all apart, then come back on here for advice on how to put your 4v intake on. We wouldn't want a vacuum leak after you go though all that work. It's really not a hard job, but there are a few tricks to help ya out.

 

Just a little tip before you get started... DO NOT PULL THE DISTRIBUTOR ! You don't have to remove it to swap the intakes and if you're a novice, getting it back where it belongs will be more headache than installing the manifold. Removing the valve covers is a good idea so the manifold doesn't hang up on the lip of the covers. Mark all of the lines , wires and hoses as you remove them. That way you can put them back where they belong. Lastly, take several digital photos of the engine wiring etc ... before you start. Then when you get ready to re-wire, re-hose and re-bracket the aluminum manifold... you'll have some excellent reference material.

Good luck , Dean