Welcome to V8Buick.com.
Results 1 to 13 of 13
  1. #1
    Join Date
    Feb 2002
    Location
    NY
    Posts
    14,419

    Default Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    ********* CAN THIS PLEASE BE MADE A STICKY ???? *********************************

    Something like this has been needed for years ... im not claiming it is complete or accurate, but, its a good start.

    Feel Free to post info for discussion to add/correct the following chart.

    __________________________________________________ _______________
    YEAR.......MODEL.....TRANS.......TYPE/BBL.........OEM #....LINE
    __________________________________________________ _______________

    1968


    .............250" Eng.
    ............................S/T............R-1-MV..........7028047
    ............................A/T............R-1-MV..........7028014

    ........... 350" Eng
    ............................S/T............R-2-2GV.........7028141
    ............................A/T............R-2-2GV.........7028140
    ............................S/T............R-4-4MV.........7028245
    ............................A/T............R-4-4MV.........7028244


    ...........400" Eng (Early)
    ............................S/T............R-4-4MV.........7028243
    ...........400" Eng (Late)
    ............................S/T............R-4-4MV.........7028247
    ...........400" Eng (Early)
    ............................A/T............R-4-4MV.........7028242
    ...........400" Eng (Late)
    ............................A/T............R-4-4MV.........7028246

    ...........430" Eng (Early)
    ............................A/T............R-4-4MV.........7028240
    ...........430" Eng (Late)
    ............................A/T............R-4-4MV.........7028248

    __________________________________________________ __
    1969
    ...........250" Eng
    ............................S/T............R-1-MV...........7029047
    ............................A/T............R-1-MV...........7029014

    ...........350" Eng
    ............................S/T............R-2-2GV..........7029141
    ............................A/T............R-2-2GV..........7029140
    ............................S/T............R-4-4MV..........7029245
    ............................A/T............R-4-4MV..........7029244

    ............400" Eng Exc Stage I
    ............................S/T............R-4-4MV..........7029243
    ............................A/T............R-4-4MV..........7029242.
    ...........400" Eng - Stage I Specific
    ...........................All/T............R-4-4MV..........7029246

    ...........430" Eng Exc Riviera
    ........................... S/T............R-4-4MV..........7029243
    ............................A/T............R-4-4MV..........7029240

    ...........430" Eng - Riviera
    ............................All/T...........R-4-4MV..........7029241

    _________________________________________________
    1970
    ...........250" Eng
    ............................S/T............R-1-MV............7040017
    ............................A/T............R-1-MV............7040014

    ...........350" Eng
    ............................S/T............R-2-2GV...........7040143
    .................(Early)..A/T............R-2-2GV...........7040142
    .................(Late)...A/T............R-2-2GV...........7040148
    .................(Late)...S/T............R-4-4MV...........7040245
    .................(Late)...A/T............R-4-4MV...........7040244

    ...........455" Eng Exc. Stage I, Riviera
    ............................S/T............R-4-4MV...........7040243.
    ............................A/T............R-4-4MV...........7040240
    ...........455" Eng - Riviera
    ............................All/T...........R-4-4MV...........7040247
    ...........455" Eng - Stage I
    ............................All/T...........R-4-4MV...........7040246

    __________________________________________________ _
    1971
    ...........250" Eng
    ............................S/T.............R-1-MV............7041017
    ............................A/T.............R-1-MV............7041014

    ...........350" Eng
    ............................S/T.............R-2-2GV...........7041143
    ............................A/T.............R-2-2GV...........7041442
    OR (NOT SURE).......A/T.............R-2-2GV............7041142

    ............................S/T.............R-4-4MV...........7041245
    ............................A/T.............R-4-4MV...........7041544

    ............455" Eng, Excl Stage1
    ............................S/T.............R-4-4MV...........7041243
    ............................A/T.............R-4-4MV...........7041540
    ............455" Eng - Stage I
    ...........................All/T.............R-4-4MV...........7041242

    __________________________________________________ ________
    1972
    ............350" Eng
    ............................S/T..............R-2-2GV...........7042143
    ............................A/T..............R-2-2GV...........7042142
    ............................S/T..............R-4-4MV...........7042245
    ............................A/T..............R-4-4MV...........7042244

    ............455" Eng, Excl Stage1
    ............................S/T..............R-4-4MV............7042243
    ............................A/T..............R-4-4MV............7042240
    ............455" Eng - Stage I
    ............................S/T..............R-4-4MV............7042942
    ............................A/T..............R-4-4MV............7042242

    __________________________________________________ ______
    1973
    APOLLO..250" Eng.....S/T..............R-1-MV.............7043017
    .............................A/T..............R-1-MV.............7043014
    ............350" Eng.....A/T..............R-2-2GV............7043144
    .............................A/T..............R-4-4MV............7043246

    CENTURY 350" Eng....S/T..............R-2-2GV............7043143
    .............................A/T..............R-2-2GV............7043142
    .............................S/T..............R-4-4MV............7043245
    .............................A/T..............R-4-4MV............7043244
    .............455" Eng....S/T..............R-4-4MV............7043243
    .............................A/T..............R-4-4MV............7043240
    ............Stage I.......All/T.............R-4-4MV............7043242

    __________________________________________________ _________
    1974
    APOLLO...250" Eng.......S/T..............R-1-MV.............7044017
    ...............................A/T...............R-1-MV.............7044014
    .............350" Eng......All/T..............R-2-2GV............7044144
    ..............................All/T..............R-4-4MV............7044246
    CENTURY.350" Eng.....All/T...............R-2-2GV............7044142
    ..............................All/T..............R-4-4MV............7044244
    ..............455" Eng.....All/T..............R-2-2GV............7044141
    ..............................All/T..............R-4-4MV.............7044240
    ..........455"-Stage I...All/T..............R-4-4MV.............7044242
    Alan W

    BPG # 1048 - Charter Member
    NE GS/GN Club - 17 Year Member
    68/69 Buick StepChild Nation - 29 Year Member

    What is a Buick StepChild ?
    Quote Originally Posted by 442w30 View Post
    ... They have awkward proportions from certain angles, and they look dumpy compared to their GM brethren
    ....'68 SportWagon400 "Sportn'Wood"..............'69 GS400 Convert "BigRed"..........

  2. #2
    Join Date
    Feb 2002
    Location
    1313 Mockingbyrd Lane, Moonbase Alpha, Magrathea
    Posts
    4,927

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    Maybe put it in the FAQ section too.
    Truzi
    1970 Buick Skylark Custom Convertible

  3. #3

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    Great!

    1971 Buick 350 A/T is a 7041142.

    Cheers, Orso

  4. #4
    Join Date
    Dec 2013
    Location
    Sacramento, CA
    Posts
    992

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    The 4mv with the biggest bowl vent in the front of the air horn is my favorite and the one i got. I got it off of a 455 firebird. I used to comb the wrecking yards and open up every rochester i could find and fill my pockets up with every internal , and external piece on them carbs. I like to use the biggest jets with the biggest needles, 76 jet and 52b needle, AX, secondary with a c hanger . I have the a and b , really the whole alphabet . With slight mods you can put electric choke, plastic secondary vacume pot, . Im sure my knowledge rivals that Gessler guy with the 10 sec buick con rochester. The head porting guy.

  5. #5
    Join Date
    Dec 2013
    Location
    Sacramento, CA
    Posts
    992

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    I should add it takes a ton of trial and error and mistakes with a Rochester before you really understand whats going on with these carbs. I like them because u can get one for 25 bucks at the wrecking yard.

  6. #6
    Join Date
    Jan 2014
    Location
    Kansas City
    Posts
    163

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    Is there a guide for 1966 300 motor?

  7. #7
    Join Date
    Aug 2006
    Location
    Waring, Tx
    Posts
    6,547

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    Here is information on 66.
    PART # YEAR BBL's C/I TRANS MAKEMODEL NOTES:
    7026040 1966 4 BUICK
    7026046 1966 2 BUICK
    7026047 1966 2 BUICK
    7026047 1966 2 BUICK SPECIAL
    7026048 1966 2 BUICK
    7026144 1966 2 BUICK
    7026145 1966 2 BUICK
    7026240 1966 4 BUICK
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  8. #8
    Join Date
    Jan 2014
    Location
    Kansas City
    Posts
    163

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    Having a difficult time trying to identify the model number of my Rochester 2 Jet carb. Off a 66 300ci motor. No numbers on it. The original carb was rusted shut, water in the motor. Bought a identical carb it also has no stamped numbers but has a sticker on it that says 58810 4920, there is also a number on the sticker of 64-7007 and says remanufactured holley. I don't know much about holleys or who made them, but this definitely has GM and 2 JET Rochester stamped into the carb castings. Am pretty sure is original equipment carb because all linkage etc, matches including transmission switch. However this carb seems to be worn out at the throttle linkage, because the mixture screws have to be turned in all the way to get the idle to come up, and I can feel play in the throttle shaft. Have a rebuilt 2 bbl. from a 350 motor 7040142 but wrong carb for this car. Looking for a carb in good shape for this, or maybe I can rebuild original carb, but pretty rusty in base plate. thanks

  9. #9
    Join Date
    Nov 2013
    Location
    Carl Junction, MO
    Posts
    60

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    I have this carb from my 69 that had a 2bbl: A/T............R-2-2GV..........7029140
    I installed a 4bbl instead.

  10. #10
    Join Date
    Jan 2014
    Location
    Kansas City
    Posts
    163

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    This is the carb I need to match up correctly, Rochester 2G 7026046, don't know if one off a 69 would match up OK, if so how much? thanks
    66 Skylark convertible Wildcat 310 ST300
    64 Skylark convertible Wildcat 355 4-speed
    Gary

  11. #11
    Join Date
    Dec 2013
    Location
    Sacramento, CA
    Posts
    992

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    I would also list Pontiac numbers , those carbs and Buicks work great together. It seems that the poeple at Pontiac tinkered with the Q jet to get the best performance out of them more than the other GM mates.
    Anson Favalessa

    Sliding down the Razor Blade of Life.

    Reading that kinda gives you that fingernails on the chalkboard feeling.

  12. #12
    Join Date
    Feb 2004
    Location
    Northeast Kansas
    Posts
    621

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    Jon at The Carburetor Shop has a complete listing of all cars and their carburetors. I've only copied and pasted the Buick page from 65 -----. There's another Buick page that goes through 1964, and pages for every other make and year.

    http://www.thecarburetorshop.com/Kbuick3.htm
    Ed Raner
    The Nailhead Nut
    ROA #279
    Vice President - ROA Board of Trustees

    click this link for information on the Riviera Owners Association. www.rivowners.org

    '63 Riviera - Original black w/ white leather
    '64 Riviera - Tastefully tweaked
    '65 Riviera Gran Sport - Silver / w black cloth
    '90 Riviera - SE White w/ Gold Package -
    '93 Riviera - SE Sapphire Blue Metallic w/ white leather
    '14 Verano - Charcoal Mist

  13. #13
    Join Date
    Apr 2003
    Location
    unadilla,n.y - upstate
    Posts
    3,345

    Default Re: Rochester Carb ID - THE DEFINITIVE GUIDE !!!

    couple things -
    > someone on here posted a real nice list of steps with good pics of the steps needed to go through the 2GC etc .
    > do a web search "rochester 2GC" or maybe "rochester dirt" or "circle track" - some good rebuild and mod info in that area from some dirt guys that redo those .
    DEL EMERSON 1965 SPECIAL/350/MUNCIE M-21/9"
    "YA' CAN'T ALWAYS PUT OFF THINGS YA' WANNA' DO FOR THINGS YA' HAVE TA' DO!!
    GSCA#4436 BPG#1579

 

 

Similar Threads

  1. Rochester Quadrajet Carb......help !
    By Dave Cowee in forum The Venerable Q-Jet
    Replies: 20
    Last Post: 01-06-2014, 12:34 PM
  2. Holley Model 4175 "Q-jet Replacement" Carb Experiences
    By Dan Gerber in forum The Venerable Q-Jet
    Replies: 3
    Last Post: 04-19-2009, 06:32 PM
  3. Holley 4175 "Q-jet Replacement" carb
    By Dan Gerber in forum Holley
    Replies: 2
    Last Post: 01-30-2007, 10:27 PM
  4. Rochester Carb Question
    By Wilderr in forum Small Block Tech
    Replies: 2
    Last Post: 03-18-2005, 09:10 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Back to top