manifold vs carb
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Freshman User
Joined: May 2003
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manifold vs carb
I just found out from my mechanic the carb on my 72 f100 is not the orginial. I'm told at some time the 2bbl carb was replaced with a 4bbl holley carb when they also replaced the manifold for whatever reason. My question is why would someone change the manifold and carb in the first place to a different kind(what would that do)? Also, How do I go about looking for a manifold and carb that goes to a 1972 F100 360 w/automatic trans, i.e. what exactly am I looking/asking for(proper terms)?
Posting Guru
Joined: Jun 1999
Posts: 2,415
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From: Comox Valley, Canada
manifold vs carb
The theory is you get better mileage with the 4bbl than the 2bbl if you keep the gas pedal off the floor 
The more common reason is for more power due to a larger gas/air mixture charge going to the cylinders
Why would you want to change back to the 2bbl carb/manifold??????
The more common reason is for more power due to a larger gas/air mixture charge going to the cylinders
Why would you want to change back to the 2bbl carb/manifold??????
New User
Joined: May 2003
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From: elmira oregon
manifold vs carb
well i had a 390 v8 with a stock 4 barel intake manifold on it and i had a Edelbrock 600 cfm carb,it worked great.i had no problems with it the carb i ran it for 7 years and never have kitted it and i also before the edelbrock put a 600 holley on it and i couldn't get it to run right.you would be better off to find a stock 4 barrel intake and use it rather than a aftermarket aluminum intake.390 and 360 take the same intake manifolds
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Senior User
Joined: Nov 2002
Posts: 315
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From: Clayton CA
manifold vs carb
This thread really belongs in the FE forum but Sparky summed up the advantages of the 4BBL combination pretty well. If you really want to change back to the stock 2BBL set-up I'm sure that there are plenty of folks who have one sitting in a shed somewhere (I gave mine away) as the 2BBL intake is usually the first thing that gets changed. 
I do disagree with the previous post regarding stock versus aftermarket especially if the stock 4BBL is cast iron; you can shed about 50 pounds by going to an aluminum manifold plus gain some performance too. I would bet that the aftermarket manifolds hold some performance advantages over the stock aluminum manifolds as well but I don't have any data to support the statement; the aftermarket guys put a lot of research into developing those things.
My advice is, if everything is working with your 4BBL, you'll be happy by leaving it as is.
I do disagree with the previous post regarding stock versus aftermarket especially if the stock 4BBL is cast iron; you can shed about 50 pounds by going to an aluminum manifold plus gain some performance too. I would bet that the aftermarket manifolds hold some performance advantages over the stock aluminum manifolds as well but I don't have any data to support the statement; the aftermarket guys put a lot of research into developing those things.
My advice is, if everything is working with your 4BBL, you'll be happy by leaving it as is.
Lead Driver
Joined: Apr 2001
Posts: 6,175
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From: Texas
manifold vs carb
If you really need a 2V intake, I've got one putting a dent in my shop floor at this moment :-)
I'm in central Texas. It should only cost a few hundred bucks to ship it overnight :-)
Seriously, the ony reason I can think of for going back to the original 2V setup is to get closest to the original setup. Say, if you were trying to show it as original or such.
I'm in central Texas. It should only cost a few hundred bucks to ship it overnight :-)
Seriously, the ony reason I can think of for going back to the original 2V setup is to get closest to the original setup. Say, if you were trying to show it as original or such.
