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Click on image for the lowdown. 
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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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| | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | There are 2 Offenhauser dual-1 bbl. intakes.
The smaller one (#1034 for the 216 and oldest 235) is 2-11/16" between bolt centers.
The larger one (#1035 for the late 235 and 261) may be marked "PG", as in "for the Powerglide engine" is 2-15/16" between bolt centers.
Relocating the bolt pattern is annoying, easier to use the smaller manifold with 216-size carburetors. | | |
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