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Old 05-17-2024, 07:15 AM   #25
1970cstblazer
All stock and staying that way
 
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Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,384
Lightbulb Re: Recommended carb for std 350ci v8?

This whole "bigger Q-Jet" talk is really nonsense. That is the beauty of the Q-Jet. They were used on 6 cylinders through 500 Cadillacs. The secondary air valves only open enough to satisfy engine demands. Yes there were 800 CFM units, mostly found 1975-up. The run of the mill 750 CFM Q-Jet will work on almost any engine these trucks will see. The main things to keep in mind are air bleed sizing, well plug sealing, idle tubes, jet/metering rod sizing, proper float level, a good matched straight core to begin with, and bushed front and rear throttle shafts.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress...

1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...

2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...

2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels
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