Here is a patent filed by Henry Ford in 1927 that shows a unique twist on a familiar design. It appears that Ford intended the Model A to have a magneto like the Model T. Note that the patent was not assigned until July 1928- several months after Model A production had begun.
On a personal note, I'm glad they didn't make the gas tanks that drawn down in production cars, I'm too long legged for that!
Model A Fuel Tank Patent - 1927/28
