Propane trucks

I drove propane powered delivery trucks in the 70's, they ran as well as gas trucks. Why doesn't Ford offer pickup trucks powered by propane? The price is less and the United States produces plenty of propane so it would not have to be imported.
James Defelice 04/29/2011
that's a good idea for propane
Johnathan Mueller 02/10/2011
Ford has recently added the option for propane trucks :)