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Mod | | | Forums66 Topics128,140 Posts1,056,774 Members48,454 | | 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!
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For helping keep this great
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| | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | Stepped up alignment rings allow the use of a 216 intake, which uses a smaller intake alignment ring then the 235, fit a 235 chevy head which has a larger intake ring and vice versa. They are nice to have when you want to install an intake that was made for a 216 on a 235 or in this case. That being said, I am pretty sure there are later YF's or YFA's with the larger bolt pattern although I don't know whether the larger YFs came with manual choke.
Mike
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