[Bob Bidonde]

I am in the process of building a Power Point presentation for my local Model "A" club that highlights the causes of engine vibrations, and the steps taken to make vibration feel better. In the presentation, I am comparing how the factory balanced the Model "A's" engine to modern methods a rebuilding shop might use.

The info posted above gave me direction for further investigation and learning about unbalances and balancing. Thanks again all for your help.