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main jet sizes?

Discussion in 'The Garage' started by gmcman, Nov 25, 2006.

  1. gmcman

    gmcman Registered Member

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    Just wondering if anyone can tell me the main jet sizes for quadrajet carbs for 305 and 350 engines. Any help is greatly appreciated.Thanks!!!
     
  2. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    I think the ones I took out of my 85 305 carb were 72'S? I opened them up to 78 when I put the Vortec heads on the 350 engine I put in it.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Way too many variables to answer that question unfortunately.

    Maybe the Rochester Service manual has that info, but you can't determine them unless you found the exact same carb number/application and looked at the jets in it.
     

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