" I’m still running the Rochester carb I rebuilt."-- - - - -I believe that is a big part of your problem. A brand new, never run Rochester makes a good paperweight. Once somebody puts gasoline into it, it becomes a stinky paperweight. A 70-something year old Rochester that's been worn out and "rebuilt" a few times is a good candidate for the recycle bin. The only reason Rochester B's exist is Chevy got tired of buying Carter carbs and decided to make their own units that were designed to barely survive the warranty period on a new vehicle in the 1950s. Chevy had no idea (and didn't care) that hobbyists would be trying to make these old rigs keep running 70 years after they rolled off the assembly line. Carter's sales slogan was "The ABCs of carburetion are 'Always Buy Carter!" They built an aftermarket direct replacement carb for the Rochester B that sold well over a million units. When the one-millionth carb came off the assembly line, the CEO of Carter had it gold plated and presented it to the CEO of General Motors.
Jerry
