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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | 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: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
I now have a 2-barrel Holley AA-1 carburetor on my 261 (over-bored 060"). I think this carburetor was used on GMC 302s. A very similar carburetor was used on many other engines (as a Holley 94, 2100, 2110 ?). I found an adapter to use the AA-1 on the stock intake manifold.
The carburetor was drilled/tapped to provide appropriate vacuum to the vacuum advance. It also has readily available adjustable jets.
This carburetor has improved the engine's performance through the full range of low to high RPM. I am still adjusting the jets to provide the optimal mixture at high RPM.
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