so ill just get the adapter with a separate gasket. Now I need to get the cfms on that carburetor 
will a 2 bbl work for offy c intake
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
Completely. All you need is this:
Amazon.com: Mr. Gasket 1933 2-Barrel to 4-Barrel Carburetor Adapter Kit: Automotive
Amazon.com: Mr. Gasket 1933 2-Barrel to 4-Barrel Carburetor Adapter Kit: Automotive
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
I missed that it came with a 4 holed gasket. I wonder why? Either way, the plate is what I was mostly referring to. You'd need one of these to go onto the Offy C (whether you use this or a 4bbl):
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Laughing Gas
Joined: Aug 2011
Posts: 1,116
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I'll have to go look this evening as my truck is located at my friends house along with the engine and the carburetor. I have no shop and he does so I utilize his haha. It is a motorcraft..just gotta see the numbers
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Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
I like spacers with individual bores vs. a single opening. Seems like the carb gets a better vacuum signal and runs cleaner.
You'll also need rig up a way to mount the throttle cable. I use a Lokar bracket and the stock cable with an Edelbrock 4v, but the primaries on a two barrel are ~1" back from a 4v and it wouldn't open the throttle all the way when I mashed the pedal.
There should be a raised number on the outside of the bore behind the throttle lever - 1.08 or 1.12, maybe? That's the venturi size. Check the FSP FAQ, IIRC the someone listed the cfm conversion chart.
You'll also need rig up a way to mount the throttle cable. I use a Lokar bracket and the stock cable with an Edelbrock 4v, but the primaries on a two barrel are ~1" back from a 4v and it wouldn't open the throttle all the way when I mashed the pedal.
There should be a raised number on the outside of the bore behind the throttle lever - 1.08 or 1.12, maybe? That's the venturi size. Check the FSP FAQ, IIRC the someone listed the cfm conversion chart.
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Laughing Gas
Joined: Aug 2011
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Well..turns out the whole carb is a frankenstein...holley on the bottom and motorcraft on the top. Lots of jerry rigging too..so I'm goin to probably go with a holley 390 or edelbrock 500 ..any good preferences?
Posting Guru
Joined: Jun 2012
Posts: 1,061
Likes: 9
From: Mims, FL
Did you get the throttle (opening all the way) sorted out? I am also mounting a 2100 on an Offy C - I have the 4bbl to 2bbl adapter mentioned here but still trying to figure out the cable & cable mount. Please tell me more!
Lead Driver
Joined: Dec 2000
Posts: 6,293
Likes: 47
From: South central, Minnesota
I don't think that's even possible. A motorcraft 2V carb has a one piece base plate and main body with a removable top. You sure it's not just a Holley that came stock on a Ford?
If you are looking for an Edelbrock 500 cfm carb I've got a used one I'd sell. I even have a rebuild kit that goes with it.
I'm going with 3-2V's on my 300 so I don't have any use for the Edelbrock. If you have any interest in it shoot me a pm.
Postmaster
Joined: Mar 2005
Posts: 2,949
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From: Earth
The solution is to mount the stock cable back ~1" or get an aftermarket cable. All Ford cable regardless of length are going to have about the same length of pull.
Post Fiend
Joined: Jun 2003
Posts: 8,209
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From: Black Hills of SD
I'm running a 390 Holley on my "C". It runs pretty good, finicky on the choke adjustment and the fuel mileage sucks. That old truck is a long ways down the list of getting attention but plans are for a 2 bbl. swap. Either a Motorcraft 2100 or a Rochester 2GC.
Lead Driver
Joined: Dec 2000
Posts: 6,293
Likes: 47
From: South central, Minnesota
