I searched this forum for "Dickeybird's Famous Cox Engine" and came up with a thread called "Powered by......".

There is a link 3-4 posts down that thread to the original thread. It is a broken link, so perhaps the original thread is gone.

However there appears to be some regurgitation of the details on the first page.

http://www.rcuniverse.com/forum/1-2-...ox-engine.html