After several weeks of nail biting , I seem to have the choke finally adjusted on this carburetor. It was a chore due to the fact i've got no tech info on this set up, and all the published data only goes so far, unlike other BBS carbs familiar to me, this particular model does not use a vacuum pod, in leiu it employs a piston and rod to move the choke blade. This is a first for me, never seen a BBS with a internal vacuum port expressly designed to move a piston.

How common is this carb? Except for the odd choke setup, noting unusual about it. I would appreciate learning more of this design.

Dave

First year for the external diaphragm-type pull-off was 1964. Prior to that year, the piston-and-link setup you describe was used. This applies to all carburetors on all Chrysler products. It's not at all obvious how to adjust the piston-and-link type pulloff: you use a needle-nose pliers to grab the end of the bracket that holds the link to the choke plate and, while holding the choke plate firmly closed, you bend the bracket away from the link (for more pull-off) or towards the link (for less pull-off). The piston was prone to gumming up with gasoline varnish, which is why it was replaced by the external pull-off. Less of a problem with today's cleaner gasoline, but still a good idea to shoot some spray carb cleaner into the slot where the link disappears into the sidewall of the carb, with the engine running at fast idle, from time to time. This keeps the piston and cylinder clean.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks Dan for the information. Learned something new about Chrysler choke designs. Took me several days to determine the bracket you referred to was the key component. I also devoted some time to removing casting flash, chasing the vacuum port and matching the gasket to ensure all was right. There is satisfaction in solving a mysterious rich condition and knowing why...too much choke. She starts with a twist of the key, cold or hot and runs like a champ:lol:

An aside, I converted to a Napa Gold air and fuel filter. No more made in China.

Dave

does this old style choke piston run in the center top of the rear of the carb?

That might explain that weird looking fixture on my older style BBD's.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

And it would explain the weird looking fixture on my older AFB's too!

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

Affirmative.. Well at least its not my brother-in-laws 69 F250 in which you must first get it idle dead cold then seek devine guidence and a human sacrifice for some choke!

Dave