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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: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | My carburetor needs replaced! the "BB" in the discharge chamber is stuck. Carb. is manual choke. I have a guy willing to sell me a Rochester B,with an automatic choke. the price is right,but does anyone have experience installing one on a 235/261,with Fenton's? Is it possible to convert the auto. choke carb. to manual,without compromising the integrity of the linkage,(vacuum leak)? any tips/ideas are APPRECIATED!! THANKS!! | | | | | Joined: Feb 2000 Posts: 5,237 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,237 | The only difference is a heat source for the auto choke to use. You can plumb a small copper line down to the exhaust manifold and wrap it around the whole manifold or lay it across, as long as the copper tube heats up, either will work. The hot air drawn in through the copper tube will heat the auto choke spring and back it off. Water heat will be to slow for a choke.
The rest of the carb should bolt right into place.
Joe | | | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | Thanks,Joe! Come to think of it,both headers have "bungs" for heat riser tubes. One could be converted easily enough,to serve both purposes. I don't know why i didn't picture that at the time i posted my question! Have a good week-end!! | | | | | Joined: Dec 2001 Posts: 1,248 'Bolter | | 'Bolter Joined: Dec 2001 Posts: 1,248 | They do make kits for converting automatic chokes to manual. I believe they sell them around those Dorman products....at auto parts places.
John | | | | | Joined: Mar 2010 Posts: 10,308 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,308 | I'm with John on the auto chokes. I like my throttle cable and sometimes wish I had a spark advance lever like a Model T. All of the so-called advances, eliminating these components were designed so that knuckleheads can drive.
Last edited by 52Carl; 08/30/2014 1:47 AM.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | Thanks,guys! I just had a guy GIVE me one,from a '55 1st-Series 6500/261! Couldn't ask for a better match! Just because I sold a couple of trucks for him,he thinks he needs to give me parts! 
Last edited by wetwilly5757; 08/30/2014 2:50 AM.
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