Y block intake swap

Lamar Wadsworth

Lamar Wadsworth

Senior Member
I have a 4 barrel intake part #ECZ-9425-B that came off a '57 Merc 312 that I plan to use with a 600 Holley on my '55 Ford 272. I have the distributor off the same 312 that I plan to use. Any potential issues I need to be aware of?

Also what is this gizmo on the 312 intake? See picture.
 
Picture didn't attach. Trying again. If I can't get a pic, it's a little round thing about the size of a quarter in diameter with a domed top. Screws into bottom on the driver's side just above the bolt and clamp that attaches the intake to the head.
 
That is not what you are describing. That's a dashpot that attaches to the carburetor. What you are describing is the cap for the air inlet of the choke hot air tube that goes across inside the exhaust crossover of the manifold to the passenger's side. On the passanger's side there should be a brass elbow inserted in the hot air tube. In that brass elbow, a steel line inserts into it, and goes the the threaded nipple on the carb choke housing to supply heat to open the choke. All of these parts are available at CASCO (classic T-Bird parts).
Or you can use an electric heated choke thermostat cap on the carb and suplly 12 volts to in only when the ignition is on.
Or get a Holley with a manual choke, or a manual choke kit for you current Holley if you have one.

Sal
 
... it's a little round thing about the size of a quarter in diameter with a domed top. Screws into bottom on the driver's side just above the bolt and clamp that attaches the intake to the head.
Click to expand...
I think you are describing this -

459276


It is a dirt deflector (ga-nats - bumbly bees - mothra like flying creatures) for the fresh air draw for the choke stove.
 

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Lamar Wadsworth said:
Since the Holley has an electric choke, it sounds like its presence will be purely ornamental.
Click to expand...
More pictures of the pieces everyone else mentioned.
If you're not using the hot air setup and the long thin tube thru the exhaust crossover under the carburetor has rusted thru, you'll get exhaust blowing out of the small holes on both ends, where the oem fittings would connect.
 

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Last edited:
I do not recall one way or the other, but am wondering if your 272 1955 heads have smaller ports to align with the 55-56 four barrel intake.

I also have a late (57) 4 barrel intake, the late 3 deuce Edelbrock (557) and at least one late 2 barrel intake (also a larger base 2 barrel) and some late (57 up) G heads around here.

Think I discarded all the early heads, pickup motor heads and 2 barrel intakes when I moved. Could not give them away or they were sold along with motors. The early 4 barrel intake for 55-56 was small carb base and the 57 was same as current 4 barrels, as is widely known.

But in addition to Ford changing their intake for the 4 barrel in 57, Edelbrock had also issued 2 different 3 deuce intakes for early and late Y block. Why would they have done that if they are the same size ports? They issued both a 553 and a 557 aluminum versions, I believe. Presumably those were designed for 54 to 56 and 57 up. I had a 553 also, but sold it and do not recall how they differed.

I would expect that the late intake probably bolts on any year heads but the head ports could be different. The late intake was designed for the "G" large valve 57 heads. Someone on here knows for sure though I imagine. I could measure ports on a late intake or head, but have no early ones left to compare with.
 
Brushwolf said:
I do not recall one way or the other, but am wondering if your 272 1955 heads have smaller ports to align with the 55-56 four barrel intake.

I also have a late (57) 4 barrel intake, the late 3 deuce Edelbrock (557) and at least one late 2 barrel intake (also a larger base 2 barrel) and some late (57 up) G heads around here.

Think I discarded all the early heads, pickup motor heads and 2 barrel intakes when I moved. Could not give them away or they were sold along with motors. The early 4 barrel intake for 55-56 was small carb base and the 57 was same as current 4 barrels, as is widely known.

But in addition to Ford changing their intake for the 4 barrel in 57, Edelbrock had also issued 2 different 3 deuce intakes for early and late Y block. Why would they have done that if they are the same size ports? They issued both a 553 and a 557 aluminum versions, I believe. Presumably those were designed for 54 to 56 and 57 up. I had a 553 also, but sold it and do not recall how they differed.

I would expect that the late intake probably bolts on any year heads but the head ports could be different. The late intake was designed for the "G" large valve 57 heads. Someone on here knows for sure though I imagine. I could measure ports on a late intake or head, but have no early ones left to compare with.
Click to expand...


'55 and '56 heads had the same sized ports. '57 is when the intake ports got larger in the heads and intake. The ECZ-B '57 intake will still work on a '55 and '56 head. The '54 heads are the ones that are with extra small ports and will not work.

Sal
 
scicala said:
'55 and '56 heads had the same sized ports. '57 is when the intake ports got larger in the heads and intake. The ECZ-B '57 intake will still work on a '55 and '56 head. The '54 heads are the ones that are with extra small ports and will not work.

Sal
Click to expand...

Knew someone had the exact info on this. Although it will bolt on, you will have a port mis-match with the 55 heads..
 
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