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Global Mod,
Mod | | | Forums66 Topics128,026 Posts1,055,405 Members48,422 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Sep 2008 Posts: 872 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 872 | What is the source of that 1 21/64ths?
My book says 1 31/64th +/- 1/32 for 28 and 228 series Zenith carbs.
One book specifically reference the 228s
Another book is pre-228s (28 Series).
None of them call for 1 21/64
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