... also taking the ECZ-B manifolds and converting them into ’57 blower manifolds

So basically, the SC EDB-9424-B intake is the same basic design (carb pad hgt - runner size) as the 4V ECZ-9425-B other than the carb pad design?

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Good eye.  That picture was quick and easy for showing the casting dates.  I do end up repairing a number of manifolds and also taking the ECZ-B manifolds and converting them into ’57 blower manifolds.  Not all of those in the pictures are original blower manifolds.  The original blower intake manifolds are definitely worth the trouble of repairing simply due to those having the correct casting numbers.
 

Lorena, Texas (South of Waco)

    shrinkflation  ?
 

Ted, same thermostat housing and no change on the water pump spacing. Makes no sense to me but I had to make a new hose 1/2" longer to make it fit and seal. I'm running Mummert heads and had the E manifold on it with the same thermostat housing. I don't have a clue.

Where did you get all the blower manifolds?

Assuming you are using the same thermostat housing and did not alter the water pump spacing, the bypass hose length should not have changed.

Lorena, Texas (South of Waco)

The casting date is located on the manifold top behind the carburetor flange which helps to at least identify the year model the intake manifold was produced for.  The newer cast ECZ-B manifolds (1960 and newer?) will not have the heated choke tube running through the heated crossover section.  There were a large number of those 4V manifolds used on the big truck line and are almost identical to the ones used on the cars.
 

Lorena, Texas (South of Waco)

The thermostat flange would have to be about 1/2 farther back vs the E manifold, if nothing else was changed.


Lawrenceville, GA

I'm in the process of installing the Blue Thunder on my '57 Bird. Replacing my E dual quad setup. Heater bypass hose was abour 1/2" too short. Any idea why?

Re 57- "B" intakes with or without the Firing Order cast on them. My intake which was bought used in western Canada, does have the firing order on it. What it was on originally I don't know & it's installed, so it's  likely difficult to check all the factory marks on it now ?.   


Paul