main jet sizes?

[gmcman]

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!!!

 

[76zimmer]

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.

 

[dyeager535]

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.