Cliff's Quadrajet Parts and Rebuild Kits
General Category => Quadrajet Carb Talk and Tips => Topic started by: Photokinetics on August 24, 2025, 06:11:25 PM
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Cliff,
I have a 1980 GMC k3500 it has a 78 Chevy 454 engine in it with the normal standard transmission that goes in trucks that is four wheel drive of course, the engine has been rebuilt it is mostly stock except for maybe an RV cam I have two quadrajet carburetors I would like to rebuild one to put on this truck which car would work better? and then what rebuild kit would work best with what modifications?
Here are the carburetor numbers, 17062222
17056540.
Thank you
Paul
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I'm not familiar with either one of those carburetor part numbers. Are they non-CCC single MAB truck carbs?
Pics?
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The first carburetor the 17069222 I think is actually a 17059222, but here are two pictures of that carburetor first, and then the next carburetor 1705-6540 and I've included pictures of it as well that's the second set of pictures.(http://)
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I'm trying to figure out a simple way to attach pictures but it's not simple!(http://)
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Okay first and third picture are the same carburetor second picture in fourth picture are the same carburetor
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Whichever carb would better suit my 454 I would also need a rebuild kit and parts to tune it.
Thank you in advance!
Paul
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I think the first carb is from a Buick. Might be hard to get all the linkage to work for what you are doing.
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I've never seen secondary linkage like on that buick carburetor? Doesn't look like the "normal" variations of linkage. Anyone know anything about this?
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From what I've read it's off in the 455 Buick, I think 1975. The other carburetor is off of a Chevy 350, I'm not sure of the year.
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In either case whichever car would work best for my 454 I will need a rebuild kit and necessary parts
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Cliff.
I'm still waiting for advice on which carb would be a better carb to build for the GMC 454 truck motor, what specs to tune it up to so I can get it finished. I found the pistons are 60 over and the cam has a 600 lift.
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You'll have linkage issues to deal with on the one carb.
The Chevy carb will work, but would need full specs on the cam & CR to give tuning advice.
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My son is the one that put the camshaft in and the only thing he remembers is that it had 600 lift. He said it's a little stronger than a RV cam.
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Lift don't mean much it's the duration & overlap.
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The carburetor I have says it's off of The 1975 Buick 455 so it should be jetted for a big engine perhaps I can take the parts out of that carb and put it into the Chevy carb after rebuild and that would be a good starting point?
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Your 1976 17056540 Buick 455 California carb should have #75 jets, 49K pri. rods and DB sec. rods.
Your 1979 17059222 Chevy 305 carb should have #71 jets, 40K pri. rods and CH sec. rods.
Since your Chevy carb has the large .120" main air bleeds you can go with the jetting from the Buick carb for your 454. You may find you´ll need larger jets, like #78-#79 after test drive.
Use the CH rods for starters. Later on look for DA, CE or AX sec. rods.
Cut the stop for airvalves to have full flow, aim for 1.37" measured from open valves to back of chokeblade housing.
Transfer choke blade and shaft from the Buick carb for a functional choke on your Chevy carb.
HTH
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Either one of those would work fine. The Chevy is going to be a little easier to use having a side fuel inlet and Chevy throttle linkage.
They will need a little help in a few areas for what you are doing. When you are ready to proceed call me at the shop, 740-397-2921...tks..
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Thank you for your replies and the information! I bought Cliff's book over 13 years ago and have rebuilt a couple of carbs using it, I have spare carburetor parts somewhere in a box, but since serious Life changes I haven't been able to do what I like to do, so I'm pretty excited to do another carburetor and to tune it to make another engine very happy! It's been a slow process but I find I need to build another workbench! 😎
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Are these two areas here the idle air bleeds? They appear very large!(http://)
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Nope, those are the upper .120" main circuit airbleeds.
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This carburetor was on a Chevy 305 or a Chevy 350, they are much larger than the ones on my Buick carburetor of the fed a 455
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Yes, the upper main circuit airbleeds in your 1976 Buick unit is about .050".
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Is this normal?
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Yes, it is what it is, different carbs, different engines, different calibrations.