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Technical Pontiac intake manifold question?

Discussion in 'Traditional Hot Rods' started by 31hotrodguy, Mar 1, 2020.

  1. 31hotrodguy
    Joined: Oct 29, 2013
    Posts: 2,698

    31hotrodguy
    Member

    Here is one for the Pontiac guys. This intake off a 56 Pontiac. My question is will it work on a 1960 Pontiac? It looks like it would but I don’t have the 60 V8 in front of me and I know that year is a little different. [​IMG]


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  2. 36 poncho
    Joined: Jul 7, 2009
    Posts: 88

    36 poncho
    Member
    from ny

  3. Bird man
    Joined: Dec 28, 2009
    Posts: 904

    Bird man
    Member
    from Milwaukee

    This intake uses a smaller carb & does not have the timing cover water bypass.
    Still a $125+ intake though :)
     
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  4. bchctybob
    Joined: Sep 18, 2011
    Posts: 5,245

    bchctybob
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    I believe 1961 was the year they made significant changes to the water passages in the heads at the intake manifold. My ‘60 Pontiac and the ‘60 Pontiac 389 we put in our boat didn’t have the bypass hose in the front of the manifold. That came later. I believe the intake manifolds fit ‘55-‘60, then ‘61-‘64, ‘65-up. The ports and passages are smaller in ‘55-56 manifold but it should fit ok.


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  5. wvenfield
    Joined: Nov 23, 2006
    Posts: 5,584

    wvenfield
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    Yeah, 55-60 should interchange.
     
  6. 31hotrodguy
    Joined: Oct 29, 2013
    Posts: 2,698

    31hotrodguy
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  7. 31hotrodguy
    Joined: Oct 29, 2013
    Posts: 2,698

    31hotrodguy
    Member

    Here is a picture of the 60. It is hard to tell but I don’t see a water passage for the timing cover. [​IMG]


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  8. It will physically bolt up. The 56 uses a Rochester small base 4 barrel carb while the 60 uses a Carter AFB carb. Not sure if port sizes are the same but if the 56 has smaller ports you'll need a 56 intake gasket set.
     
  9. wvenfield
    Joined: Nov 23, 2006
    Posts: 5,584

    wvenfield
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  10. bchctybob
    Joined: Sep 18, 2011
    Posts: 5,245

    bchctybob
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    Unless you’re getting the ‘56 manifold for a smokin good price I would hold out for a later manifold or even an old Edelbrock P4b.


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  11. 31hotrodguy
    Joined: Oct 29, 2013
    Posts: 2,698

    31hotrodguy
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    I’ve had the 56 intake for years. I originally bought it for a 55 Pontiac I had but the car is long gone.


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  12. carbking
    Joined: Dec 20, 2008
    Posts: 3,729

    carbking
    Member

    The manifold should bolt up to the cylinder heads. Unsure about generator brackets, A.C. brackets, etc.

    As Rocky mentioned, the 1956 used either the Rochester 4-G or the Carter WCFB 4-barrel. While the carburetor bolt pattern is the same on the 1956 as the Carter AFB used in 1960, the secondary throttle size in the AFB are larger. At best, there would be a restriction of airflow on the secondary side. At worst, the secondary throttle plates might hit the intake manifold.

    Would suggest looking for a 1960 cast iron Pontiac intake. The aftermarket aluminum manifolds for this period Pontiac will lose you both weight AND power. Since virtually all Pontiac enthusiasts believe the legend of tripower, finding a genuine Pontiac 4-barrel intake should be relatively easy, and inexpensive.

    Jon.
     
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  13. 31hotrodguy
    Joined: Oct 29, 2013
    Posts: 2,698

    31hotrodguy
    Member

    Good to know! Does the aftermarket intake not flow as well as the factory cast iron ones?


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  14. toxic waste
    Joined: Dec 18, 2011
    Posts: 383

    toxic waste
    Member
    from Iowa

    Up to 1960
     

    Attached Files:

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  15. toxic waste
    Joined: Dec 18, 2011
    Posts: 383

    toxic waste
    Member
    from Iowa

    1961 to 1964
    The heads are not the same
     

    Attached Files:

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