3100,
If you are using a modern 12v electric wiper (conversion) unit and it works with the modern (conversion) 12 volt radio, this might be another plus to the new radio. The only electric wiper unit that works with the original '54/55 Chevrolet truck radio is the original GM accessory 2-speed electric wiper unit (6v and requires holes drilled through the dash).
Please let us know if your wiper and radio units fit together.
Tim
