Joe

I have a 1972 Ford Mustang fastback with a 351C-4V Cleveland, 4-speed
manual with a Hurst shifter, and an Autolite 4300D 4bbl carb (D2ZF-AA)
(I don't know the cfm rating). It currently has stock intake manifold
and cam, but I plan to eventually upgrade it performance. I was
thinking about either having the 4300D carb rebuilt by Pony Carbs or
replacing it with a Holley or something else. Any suggestions? Also,
does anyone know what the cfm rating is for the Autolite 4300D
(D2ZF-AA) with 1.25in venturi? Thanks....

one80out@hotmail.com

Joe wrote:
> I have a 1972 Ford Mustang fastback with a 351C-4V Cleveland, 4-speed
> manual with a Hurst shifter, and an Autolite 4300D 4bbl carb
(D2ZF-AA)
> (I don't know the cfm rating). It currently has stock intake
manifold
> and cam, but I plan to eventually upgrade it performance. I was
> thinking about either having the 4300D carb rebuilt by Pony Carbs or
> replacing it with a Holley or something else. Any suggestions?
Also,
> does anyone know what the cfm rating is for the Autolite 4300D
> (D2ZF-AA) with 1.25in venturi? Thanks....

I have a 625 cfm Edelbrock on my '70 Cougar 351C-2v. Five years old
and it's always worked great.

I don't know the cfm of your carb for sure, but I've seen references in
the magazines to 450-500 cfm or so.

180 Out

Grover C. McCoury III

Joe wrote:
> I have a 1972 Ford Mustang fastback with a 351C-4V Cleveland, 4-speed
> manual with a Hurst shifter, and an Autolite 4300D 4bbl carb (D2ZF-AA)
> (I don't know the cfm rating). It currently has stock intake manifold
> and cam, but I plan to eventually upgrade it performance. I was
> thinking about either having the 4300D carb rebuilt by Pony Carbs or
> replacing it with a Holley or something else. Any suggestions?

You should *at least* be using a 600 CFM rated carb - preferably a 650
CFM rated carb.

Yet another $.02 worth from a proud owner of a 1970 Mach 1 351C
featuring a 750 CFM Holley double pumper @
http://community.webshots.com/album/18644819fHAehGJAjt

Joe

Grover C. McCoury III wrote:
> Joe wrote:
> > I have a 1972 Ford Mustang fastback with a 351C-4V Cleveland,
4-speed
> > manual with a Hurst shifter, and an Autolite 4300D 4bbl carb
(D2ZF-AA)
> > (I don't know the cfm rating). It currently has stock intake
manifold
> > and cam, but I plan to eventually upgrade it performance. I was
> > thinking about either having the 4300D carb rebuilt by Pony Carbs
or
> > replacing it with a Holley or something else. Any suggestions?
>
> You should *at least* be using a 600 CFM rated carb - preferably a
650
> CFM rated carb.
>
> Yet another $.02 worth from a proud owner of a 1970 Mach 1 351C
> featuring a 750 CFM Holley double pumper @
> http://community.webshots.com/album/18644819fHAehGJAjt

Are there any intake/carb combinations that are emissions legal? My
state (Illinois) is strict with this stuff.

big-spud@shaw.ca

look for a 735cfm holley that came on 428cj, bell shaped primary
venturi boosters gives carb, injector-like throttle response.

Mike R

In article <1111677010.271671.118400@f14g2000cwb.googlegroups.com>, "Joe"
<lanser1996@joltmail.net> wrote:

> I have a 1972 Ford Mustang fastback with a 351C-4V Cleveland, 4-speed
> manual with a Hurst shifter, and an Autolite 4300D 4bbl carb (D2ZF-AA)
> (I don't know the cfm rating). It currently has stock intake manifold
> and cam, but I plan to eventually upgrade it performance. I was
> thinking about either having the 4300D carb rebuilt by Pony Carbs or
> replacing it with a Holley or something else. Any suggestions? Also,
> does anyone know what the cfm rating is for the Autolite 4300D
> (D2ZF-AA) with 1.25in venturi? Thanks....

The 4300D was the spread bore version (much larger secondary throttle bore
diameter compared to the primary) and rated at 715 CFM. The Autolite
(D2ZF-AA) engine application was the 351CJ-4V (Q-code) Cleveland w/manual
trans for model year 1972...HTH

--
Mike
93 Cobra