> it was a bug engine that ran on 2 barrels one side, and the other side
> was used as a high output air compressor.
> ---------------------------------------------------------------------------------------------------

Actually, it was probably configured with two OPPOSED cylinders to
provide power, the other pair to act as the air pump.

As a point of interest, people have been doing his type of conversion
since before the First World War. In 2000 I posted a message to this
Newsgroup explaining how to convert a running VW engine into a two-
cylinder air compressor without having to dismantle the engine.
(Search this Newsgroup using 'veeduber air-compressor' as your seed.)
But it assumes you already know the basics of air compressors. What
Dunn-Right offers is a complete kit of all the bits & pieces.

-Bob Hoover