Quadrajet Problem Solving > Quadrajet Parts and Numbers

Buying used,older qjet for an 86?

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soonertank:
Sorry, I'm still learning (got your book on the way, should be here Saturday!) so I may not have understood what your saying. 

I'm going to put the older 1977 #17057204 carb on my 86 Chevy truck with a 4.3 liter engine. Your saying that the stock jet for that carb will be a good starting point for my engine? And what do you mean by "large airbleed model" ? Is the carb no good?

Cliff Ruggles:
Nothing wrong with them at all.  Starting in 1970, the Chevy q-jets showed up with large main airbleeds, and revised calibrations for emissions.  They used them until the single main airbleed models were produced.  Having large main airbleeds, they tend to be lean at part throttle, so I'd start out with the stock jets and metering rods, do some testing, and upgrade if/as needed.....Cliff

soonertank:
Ok, thanks Cliff. Can't wait to tackle it!

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