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  1. #1
    Join Date
    Dec 2016
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    Hines Creek, Ab. Canada
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    20

    Default Correct carb for 63 Wildcat with a 425

    I bought a 63 Wildcat coupe that supposedly had a 401 in it. After checking the numbers I found it's a JW engine 425 with auto trans. The carb was gone when I bought it. What's the correct carb for this engine? Where would I find the information?

    Thanks, Mark

  2. #2
    Join Date
    Feb 2002
    Location
    North Carolina
    Posts
    26,442

    Default Re: Correct carb for 63 Wildcat with a 425

    The later half of the 63 model year saw the introduction of the 425 cid nailhead. Perhaps your engine is factory. What month is on the cowl tag?
    Jim Lore
    BPG 1037
    "If you cannot clear up the confusion at least make the confusion clear."

  3. #3
    Join Date
    Jul 2008
    Location
    Sherwood Park, Alberta, Canada
    Posts
    2,597

    Default Re: Correct carb for 63 Wildcat with a 425

    The 1958-69 Buick parts master catalog shows it to be a Carter AFB 3578A; - there is no listing for the Rochester 4GC for the 425. The funny thing is the listing is for a 1962, 1963 is the only year that isn't listed, so I'm assuming it'll be the same as 1962. In 1964 they used a different transmission, so the throttle linkage is going to be slightly different.

    So there's a very good chance that it's an AFB; - that said, anything from 1961-1963 will probably physically fit as long as it came off a nailhead engine. Then it's just a matter of jetting and tuning. As stated, the 64 and later had a different switch-pitch linkage that is not on the 63 edition, which had a stator control instead.
    Marc,
    66 Electrafied,

    '66 Buick Electra 225 Conv. (Going to finally get this thing finished this winter, since I can't sell it)
    '67 Buick Wildcat Custom Conv. (...the Cat came back the very next day...)
    '01 Buick LeSabre Limited
    '08 Buick Allure (Canadian LaCrosse, and not very "alluring"...)

  4. #4
    Join Date
    Dec 2002
    Location
    Bucks County, Pa
    Posts
    6,530

    Default Re: Correct carb for 63 Wildcat with a 425

    There's a list of AFB carb numbers here:
    http://www.v8buick.com/showthread.ph...igned-to-Buick

    Major differences would be:
    engine size: small block vs big block (300/340 vs 401/425)
    and linkage type, which would depend on the transmission.
    There are minor differences between automatic vs manual trans, and 49 state vs Calif carbs.
    And very minor differences in jetting and choke tuning.
    Walt K
    (1)'66 GS Astro Blue, 13.41 et (2)'66 GS Saddle Mist, L76 Q-jet option, 1 of 132 (3)'66 GS Flame Red, Calif car (4)'66 GS Silver Mist, 4 speed (5)'66 Special, Flame Red, 300 (6)'79 Turbo Regal, 14.1 et (7)'65 GS 4 speed 'vert

  5. #5
    Join Date
    Jul 2011
    Location
    Wellington, New Zealand
    Posts
    281

    Default Re: Correct carb for 63 Wildcat with a 425

    Mark, you're in major snow country all the way up there. Closest I got in my travels would have been Dawson Creek.
    How soon do you need a carbie? If you have trouble getting one out of US I'll have one available in a few months, ex NZ.

  6. #6
    Join Date
    Jul 2004
    Location
    ct.
    Posts
    3,581

    Default Re: Correct carb for 63 Wildcat with a 425

    As most of us know AFB's are ALL basically the same. Where they differ mostly is in idle jet sizes & idle air bleeds which are not as readily changeable as jets & metering rods. Also the primary throttle shafts between diff. trans. types & yrs.


    Tom T.
    Tom Telesco
    Classic and Muscle Automotive
    12 Cook St.
    Norwalk, CT 06853-1601
    Day Phone 203-324-6045 ET
    NailHead Mini-Starters '53-'66
    Adjustable Roller Tip Rocker Arms - All NailHeads
    Custom Forged Pistons
    Many parts to numerous to list
    "If I can't get it, you don't need it!"

  7. #7
    Join Date
    Dec 2016
    Location
    Hines Creek, Ab. Canada
    Posts
    20

    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by flynbuick View Post
    The later half of the 63 model year saw the introduction of the 425 cid nailhead. Perhaps your engine is factory. What month is on the cowl tag?
    Thanks for the replies everyone! This is great! Here's a picture of the cowl tag. This is a Canadian built car. From what I've found out so far they did things different here when it came to numbers!
    Attached Images Attached Images

  8. #8
    Join Date
    Dec 2016
    Location
    Hines Creek, Ab. Canada
    Posts
    20

    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by roadrunnernz View Post
    Mark, you're in major snow country all the way up there. Closest I got in my travels would have been Dawson Creek.
    How soon do you need a carbie? If you have trouble getting one out of US I'll have one available in a few months, ex NZ.
    LOL not that bad! Was only -33 C yesterday morning! If you made it to Dawson you weren't far from here! Another 1 1/2 hours drive east. Thanks for the offer! I'll let you know.
    Mark

  9. #9
    Join Date
    Jul 2011
    Location
    Wellington, New Zealand
    Posts
    281

    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by WildcatMark View Post
    LOL not that bad! Was only -33 C yesterday morning! If you made it to Dawson you weren't far from here! Another 1 1/2 hours drive east. Thanks for the offer! I'll let you know.
    Mark
    Actually made it all the way up to Dawson, crossed the Klondike on a barge, then on to Tok, AK via the Top of the World Highway. Hardly a highway tho, the old 22' Lazy Daze took it all in her stride.

  10. #10
    Join Date
    Dec 2016
    Location
    Hines Creek, Ab. Canada
    Posts
    20

    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by roadrunnernz View Post
    Actually made it all the way up to Dawson, crossed the Klondike on a barge, then on to Tok, AK via the Top of the World Highway. Hardly a highway tho, the old 22' Lazy Daze took it all in her stride.
    Lived in Whitehorse for almost a year when I was a kid. Been meaning to go back and see more of the country. I'll make it there one of these years!

  11. #11
    Join Date
    Jun 2002
    Location
    Cornfield.Indiana
    Posts
    5,351

    Default Re: Correct carb for 63 Wildcat with a 425

    I probably have the carb you need......let me check.....if you are interested.

    Peace WildBill
    WildBill Burton
    http://www.youtube.com/watch?v=ykRZbOb1c5c

    TOPCAT 1966 Wildcat GS 4-spd
    Buick X-code Aluminum 2x4 intake
    3:91 posi Neon Blue Metallic
    ????? 1966 Wildcat GS 455 Stg 1
    Gear Vendors OD-3.91posi rearend

    1987 Turbo-T (Kylie's car) SOLD !

    W.O.T. Director of Vice

  12. #12
    Join Date
    Dec 2016
    Location
    Hines Creek, Ab. Canada
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    20

    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by Topcat View Post
    I probably have the carb you need......let me check.....if you are interested.

    Peace WildBill
    Thanks Wild bill! I'll check with my parts guys here. They're pretty good. I'll keep you in mind! Mark

  13. #13
    Join Date
    May 2004
    Location
    Manitoba, Canada
    Posts
    6,225

    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by WildcatMark View Post
    Thanks Wild bill! I'll check with my parts guys here. They're pretty good. I'll keep you in mind! Mark
    If Wild Bill has one, you can be assured it will be a quality piece.
    Tom B
    05 Legend Lime Mustang GT convert.
    07 Lincoln Navigator

    No more Buicks....for the time being. Can I still play here?

    There's no such thing as a free lunch. Get used to it.

  14. #14
    Join Date
    Dec 2016
    Location
    Hines Creek, Ab. Canada
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    Default Re: Correct carb for 63 Wildcat with a 425

    Quote Originally Posted by Mister T View Post
    If Wild Bill has one, you can be assured it will be a quality piece.
    Always good to hear about a fellow member!
    One of my local suppliers quoted me 235$ plus 64$ core for a rebuilt. he has a listing for the carb I need. I gave him the go ahead to see if he can get it. With customs and shipping I'm guessing it's probably my best bet. Thanks to every one that helped with the information I needed!

  15. #15
    Join Date
    Feb 2004
    Location
    Hudson, Wisconsin
    Posts
    244

    Default Re: Correct carb for 63 Wildcat with a 425

    Your correct carb is on ebay now if you still need one.
    http://www.ebay.com/itm/Carter-AFB-C...RYbm2x&vxp=mtr

 

 

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