If a shop manual isn't to be found then you can pick up a rebuilding kit for one of the carbs. They are pretty much the same kit for all the models of the B Rochester. The instructions in the rebuild kit will get you through a complete teardown and call out all the parts. If you don't need to use anything from the kit at least you'll have it around if someday it is needed. Last one I bought was 4 years ago from Auto Zone and cost under $8.00 so might be about 10 bucks now. The Sorenson kit has very complete directions and the pics to go with it.
