64' 292 truck with rochster B running rich

[johndob]

help ! i have a 64' C-10 with a 292 6 cyl. when i bought the truck it had a after market holley 2 barrell on it and ran ok. i wanted to put it back original and found a rochester B carb. at a swap meet. it looks to be the correct carb for the truck from what i have seen online and hooked right up to the stock linkage. i did have to trim the bottom off of the external throttle link. or it would have hit the intake manifold and not let the truck idle down so maybe the carb came off of a 6 cylinder car ? i think it is a BC since it is set up for a automatic heat spring type choke. i re-built the carb (even though there was not a jet in the re-build kit) and it runs great. starts much easier and runs much smoother than it did with the holley. my only problem is that it seems to run very rich. it blows more smoke that normal (little bit of smoke on acceleration and a big quick puff when letting off the gas) and i can run the mixture screw in until it seats and it wants to keep increasing rpm's and vaccuum. the jet that is in it is a 57 (not sure if that is stock or if someone replaced it or even drilled it out). any thoughts on why it runs rich and i can seat the mixture screw all the way in ? maybe a blocked passage somewhere.......... any ideas would really be a big help. i will try to post a pic of the carb tomorrow. thanks - john

[dantimdad]

It sounds to me like it had been rebuilt and done incorrectly. I would order a kit (very cheap), get a set of instructions off the internet and get a clean work surface and rebuild it yourself. Rochesters are easy.

Steven