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- Carter Dual 4-Barrel Carburetor Idle Adjustment
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- Carter Dual 4-barrel Carburetors, Linkage Sticking
- Buick Cam Specifications for 401 and 425 nailheads
- Buick Cams from Kenne Bell, 401, 425
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- 1963 nailhead cam specs
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Thread: 1966 Buick Electra Engine

  1. #1
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    1966 Buick Electra Engine

    Hi,

    i am am helping friend who has a 66 Electra. It has a red engine, but has a air cleaner label for Wildcat 445. Is there any way to tell whether it is a 401 or a 425?

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    The 401 and 425 both could be red in 66. Most likely a 401 since 445 was the Tq of the 401 and 465 the Tq of the 425 on the air cleaner. You should find an MT or MR stamped on the right side of the engine on the valley pan rail in front of the valley cover if it is a 401.
    Last edited by Dr. Frankenbuick; 01-09-2018 at 07:11 PM.
    Steve B.



    67 GS 525 Buick Stage IV
    66 GS Convertible
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    63 Riv
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    The greens

    Thanx Dr.,
    but the guy also has a 66 Wildcat with a green engine. Where does that into the scheme of things.

    ntl, the next time am near the cars I will check the codes.

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    The green 66 is a 401 unless repainted. The GS Skylark has a red 401 (MR) only in 66 that could have been transplanted into your car or all 425 (MW) were red in 66.
    Steve B.



    67 GS 525 Buick Stage IV
    66 GS Convertible
    65 GS HT
    63 Riv
    02 Subaru WRX Turbo
    03 Ford Cobra Convertible (Factory Supercharged)

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    red 66 engine

    yes, it could have been a transplant. as we noted, i will not be able to know until i look at the coding on the engine.

    but i was hoping there was some way. he wanted to know also.

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    The last eight digits in the vin # are stamped on the left hand side of the same valley rail. You have the original motor of the car if that partial vin on the engine matches the last part of the vin # of the car. Are you trying to see if the engine is original?
    Steve B.



    67 GS 525 Buick Stage IV
    66 GS Convertible
    65 GS HT
    63 Riv
    02 Subaru WRX Turbo
    03 Ford Cobra Convertible (Factory Supercharged)

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    thanks for the response and continuing patience with me on the issue.

    yes, i am trying to see if it is original. but i am also, and first of all trying to see if it is a 401 or a 425. i thought i could find out the size by looking at a stamping some place. could you confirm where that is? would you have a picture of that MT, M? stamping to show the location. i thought that some of the numbers were on the valley cover, but i am not near any cars at this time; away at work. so if there were pictures, i could guide him.

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    Steve B.



    67 GS 525 Buick Stage IV
    66 GS Convertible
    65 GS HT
    63 Riv
    02 Subaru WRX Turbo
    03 Ford Cobra Convertible (Factory Supercharged)

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    so this is at the very front of the block casting in front of the valley cover? just to be sure.

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