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motorcraft 4300d

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Hey do any of you all known if the 4300d carb. is a 750 cfm or 715 cfm carb. like ford said are is it a 605cfm.I have a D2ZF-AA would this be a 715 or 750 carb.also if anyone has a untouched Boss 351 or 351 HO with the original carb. and intake can you post a picture? And was the H.O.intake a spread bore cast iron intake.Thanks

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  • 1 year later...

Here you go...carb was for...


72 351CJ Mustang (w/MT) exc/Calif.


4v 605 cfm


7/8" fuel inlet


Manual Trans





I believe the 4300D (spreadbore) came out w/ the '71 351CJ mid yr engine & had a higher CFM (750?) than the 4300A (605CFM squarebore). 4300D also saw service on 460 engines.

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See this article




They sat 715 cfm



351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        


Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]



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Yup, 715 cfm.. 4300D was fords "autolite/motorcraft" bad boy carb of the time and quite the odd ball..I have my original 4300D still, same carb they used in 73 q codes too...Mine come with a spread bore cast iron intake that only works with a 4300D carb....Carb is in my parts room, but the intake is in storage unit thou.

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