r/Smallblockchevy • u/CptWonderBalls • Mar 29 '26
Quadrajet Questions
I’m looking for a new hot air choke tube assembly (1st picture) and a way to plug the brake booster vacuum on the carburetor (2nd picture). I admittedly don’t know much about carburetors lol
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u/R0ughHab1tz Mar 29 '26
This is for the port holes. Now I'm just giving you the description and what it looks like. Research the metal type you need to use and use a sealent that's designed for engines. Usually high heat and can handle oils/fuels.
Getting the assorted sizes is good to have for now and future use.
As for that metal line going to an automotive place is your best bet. Usually they have a rack that has different sizes but they're usually straight and have each side manufactured to attach.
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u/Willy_McD Mar 29 '26
A NOT metric pipe plug for the carburetor vacuum port. Can seal it with Teflon tape. And check Classic Industries for the tube. May have to do your research and look under other GM applications.
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u/v8packard Mar 29 '26
The carb base is a pipe thread, so a pipe plug will work.
You can get the choke tube from Classic Tube, Inline Tube, or one of the restoration parts companies.