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Buick 350 Q-Jet

Discussion in 'The Venerable Q-Jet' started by 68Rivi_In_Cali, Oct 12, 2010.

  1. 68Rivi_In_Cali

    68Rivi_In_Cali Well-Known Member

    Hey guys, A guy is seling 7 different Q-jets, all are from the year around 70, since the numbers start in 70, Well My question is, Will any of these work with the 69 Buick 350? It currently has a Holley 600cfm carb with the pvc valve blocked off :shock: I was hoping on gaining some HP, since the car's engine sounds healthy and cammed. I'm not sure if the metering jets will affect teh car. I want to throw on a q-jet back on since I have rebuilt them before.

    Here are the carb numbers he has, The first one is off a 73 Corvette

    7043202----------Chevy
    , 7058463,--------Pontiac
    7043230,---------Cadillac
    705924, ---------Chebby
    7044502,---------Chevy
    7043252,---------- Olds
    7059527-----------Chevy

    Which One would be closest to the Buick 69 350? Olds? Same torque, or will any do with a good rebuild, I'm just concerned about the Jets, And will it be better off with a Q-jet than the 600CFM holley
     
    68Rivi_In_Cali, Oct 12, 2010
    #1
  2. Schurkey

    Schurkey Silver Level contributor

    Things to look at:

    Throttle linkage/lever arm
    Choke style
    Fuel inlet position
    Square-bore vs. Q-jet Spread-bore bolt pattern

    Pontiac often needs special air cleaner due to carb vent stack clearance. Otherwise, Holley and Q-jet may or may not take same air cleaner due to choke interference.
     
    Schurkey, Oct 12, 2010
    #2
  3. techg8

    techg8 The BS GS

    If you want the exact right calibration for your 69 350, you need a 7029244 Qjet (69 sbb 350)

    BUT lots of other Qjets would "work" just fine.

    With a used Qjet, you never really know what you get. At LOT of the Qjets I see have been "modified" in some way shape or form inside.

    IMO whatever qjet you choose, youre looking at checking the insides/rebuilding to your application.

    All that said, from the list you provided I would choose the Corvette Qjet in the hopes that it came with some fatter jets, smaller rods, richer secondary rods etc for some more power. Only trouble is it is going to be a side fuel inlet.

    Then again, that Olds 7043252 would probably have the front inlet....and a quick internet search calls it a Toronado 455 carb
     
    techg8, Oct 13, 2010
    #3

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