Re: 1970 350 quadrajet questions.
The ones you have, if you can read the numbers, will probably be correct. The range you are seeing is because of calibration for engine size, cam, compression and altitude, just to name a few variables. You could try contacting one of the carburetor gurus about the proper jets and metering rods.
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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