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Carb spacer 4300D.
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Anderslober View Drop Down
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    Posted: 01-December-2019 at 4:55PM
Hi forum...now that I have a nice original 4300D going into my 72 GTS 351CJ, will I need a spacer?

Was there a spacer in the original setup?
Thanks...
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Rockatansky View Drop Down
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the EGR plate, and mind the worm channel beside the carb pad because there are different ones
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handsofstone View Drop Down
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Based on the length if the studs I am going to go with yes. My first car in 1980 had one that may have been bakelite or a similar material. You will get the correct answer in a few minutes.

Edited by handsofstone - 02-December-2019 at 2:12PM
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Anderslober View Drop Down
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My car has no worm channel. See picture. Will I still need the spacer?
Thanks.
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handsofstone View Drop Down
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Aluminum would be a good spacer as it would help keep the carb cooler which is never a bad thing.
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Anderslober View Drop Down
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Another picture. Need spacer still? Thanks.
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handsofstone View Drop Down
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I have the aluminum spacers under my carb. Three of them. Had a detonation issue and now I don't.  Might have been the jet change that fixed it along with timing. If everything lines up without the spacer I would be surprised. The kickdown rod will tell you one way or the other. If it fits correctly without a spacer I would be surprised. We had to bend mine a bit to make it a little longer so it worked as designed.
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handsofstone View Drop Down
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Is your car a 4 speed?
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Anderslober View Drop Down
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My car is a 4speed/351CJ.....
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I have googled many pictures of Torino/Mustang 4300D setups. Some have spacers...some dont.....what was factory?
I bought a Motorcraft 4300D spacer on the ‘Bay. It is about 5mm thick. 
All ideas welcome.
Here is a picture of the spacer.
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californiajohnny View Drop Down
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thats the thick base gasket. your studs look short so that should be fine Wink

idk if you can find the correct plastic 1/2" thick solid plastic phenolic spacer with correct longer studs would be good if you have hot "boiling over" issues later Wink
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74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
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the aluminum spacer was normally for the EGR valve which you not have(worm hole trench) that's a good thing!Big smile
JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
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Anderslober View Drop Down
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VERy hard to find the correct phenolic spacer....

Is old stock the only way,or does someone sell ‘em?
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I have never heard of anyone reproducing the '72 spacers. There is a seller that is advertising that he has spacer for sale, but it is a '73 spacer. It has the egr port on it.

https://www.ebay.com/itm/1973-FORD-MUSTANG-AND-MACH-1-351C-4BBL-351CJ-ENGINE-EGR-CARB-SPACER-D3ZE/392516124780?hash=item5b63c8c06c:g:nQQAAOSwA3ddvv-M

Edited by dave302 - 02-December-2019 at 8:04PM
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californiajohnny View Drop Down
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get the carb all rebuilt and put it on with the thick gasket you got and try it... should be fine without any spacer...
JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
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dave302 View Drop Down
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There is another '73 spacer for sale.
https://www.ecklers.com/ford-mustang-carburetor-spacer-plate-machined-billet-aluminum-for-cars-with-egr-351c-v-8-with-4-bbl-carburetor-44-46179-1.html
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There is another '73 spacer for sale.
https://www.rearcounter.com/D3ZZ-9A589-A-parts439021.html
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Anderslober View Drop Down
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I will use the thick gasket. Should be good.....

I do not think Ford used those other fancy type spacers......Confused

Awesome!
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aquartlow View Drop Down
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Originally posted by Anderslober Anderslober wrote:

Another picture. Need spacer still? Thanks.

Looking your intake manifold's carburetor mounting stud length, I don't believe their long enough to enable a spacer to be used other than the thick carb gasket you pictured above.
www.supermotors.net/22468
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Rockatansky View Drop Down
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1972 had a Ram-Air option so Ford may've ditched the EGR & any spacers for hood clearance?

Anderslober, are the large secondary throttle bores perfectly round or are they an odd egg shape?
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Anderslober View Drop Down
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wow...never seen that before! Didnt even check that....will check! It is even difficult to see on my pictures.
IF they are egg shaped......then what?
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Rockatansky View Drop Down
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that's what DeTomaso did to the stock intake to allow the use of a square flange Holley carb

i just wondered if somebody did the same to yours, hard to see from the pic

all's well carry on!
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