Ford Manifold ID - Help Requested

Both are Mustang/Cougar/Torino/Montego/Ranchero/Pantera manifolds.

The first one has a spread bore hole pattern and a big EGR trench that runs along side the carburetor. If you can't see the trench its because there's a sheet steel gasket still in place. Designed for 4300D carburetors, 1973 & 1974 engines, this is a Pantera L manifold. Snake a chain through this one and use it as a boat anchor. Joking aside its valuable to the guys wanting to restore their Pantera (or Ford) to stock.

The second one has a square bore hole pattern, the holes are a bit small, designed for a 4300A carburetor. This one was installed on 1970/1971 M code engines, the same engines that came with quench chamber heads. This one would have been used in the earliest Panteras, Pushbuttons and Pre-Ls like John Buckman's. Ford started making Panteras at their new factory in Modena in April 1971, the M code engines were replaced by the Cobra Jet engines in July 1971. The channel that runs above the primary holes is for carburetor heating or de-icing. This is a good manifold, better than the Edelbrock Performer, in my opinion.

George -

Thanks for the detailed info.

I will copy and paste this into my Craigslist ads, although I may consider a swap of the second manifold (the DOAE-9425-L) onto my "spare" engine.

Appreciate you taking the time to help me with this one.

Chuck

And the D1ZE-9425-BB, is it "good"?

Hello René

That is the 1972 Cobra Jet manifold, designed for a spread bore 4300D carburetor. Unlike the 1973/1974 manifold, it has no channel alongside the carburetor mounting flange for EGR. If a person feels they must use the 4300D carburetor, yours would be the preferred manifold due to the lack of that EGR channel.

However, the earlier D0AE manifold (designed for an Autolite 4300A carburetor) and a 650 cfm or 750 cfm square bore carburetor (aftermarket) would be a better choice. Even a 1970 Autolite 4300A carburetor is calibrated better than any of the 1972 - 1974 Motorcraft 4300D carburetors ... and the appearance is virtually identical.

If a person feels they must have an iron manifold and Ford carburetor to pass inspection, a 1970 induction (the D0AE manifold and the 1970 4300A carburetor) gets my vote. I would be surprised if any inspector in Europe was knowledgeable enough to discern the difference between a 1970 induction and a 1972 - 1974 induction. The inspectors at the California smog stations back in the 1970s were not.

It isn't for the inspection, it is only to know if it works better or worse than a Edelbrock Performer?

I know De Tomaso would mill the holes of the spread bore manifold to accommodate a 650 cfm Holley, but that was just being cheap. The only "good" purpose for the D1ZE manifold is to match with the 4300D carburetor. But the 4300D carburetor is not recommended. Even the manifold was a bit "wonky". Ford cast the spread bore manifolds so that the primary holes were in the middle, i.e. the carburetor was off-set towards the rear of the engine. The purpose was to improve fuel distribution during part throttle operation (emissions), at the expense of "performance".

So if you already own the Edelbrock Performer and an aftermarket carburetor, keep them.