http://hallpantera.com/cgi-bin...a-inc&item=22759
This is an updated version of the Detomasso lettered manifold. It has thicker flanges and better casting finish.
It's available two ways from Hall. One for the original 4v iron heads and one for the "high port" Motorsport aluminum heads such as the A3, B351, C302 heads. You can't use one on the other.
The picture above is of the high port version. The intake runners are 5/8" higher at the head intake port. The 4v version typically shows more flange at that point.
I've used both versions. Currently, the high port on A3 heads.
They are intended for use on a Pantera. That's why the linkage tower is cast in to it. That is Pantera "unique". The Pantera uses a throttle cable that pulls on the linkage bellcrank. Other applications do not and you will likely need to use a carb adapter kit that puts the full inlet/throttles in parallel.
That works but because you loose line of sight to the valve on one side, you loose power as a result and it is noticeable.
The distance from the carb mounting flange to the valve is optimized for both power and response on this particular manifold. The Australian manifolds are not.
It "is said" that Ford had "Holman-Moody" design, build and dyno the original manifold for Detomaso. They first appeared on the Euro Group 4 factory race cars around 1972.
If you intend to use it on another application like on a Mustang, the tower is in the way and you use different linkage mounted on the drivers side over the valve cover.
You didn't say what you intend to use it on. Not everything done on a Pantera 351c is transferable to another application. There are a few unique Pantera applications.
With other aftermarket heads such as CHI, you are on your own. Most likely you will need to use their intakes to match the heads. The Hall and Detomaso manifold likely will only EASILY fit the Ford heads.