Ed,
Take a look in the Gallery at 1955-1st series and 1955-2nd series trucks (the Gallery link is at the top of this page).
If you do not see the emblems that you are looking for, come back here and let us know if you have a 1st series or a 2nd series 1955 Chevrolet (at least one of the trucks in the 1955-1st gallery is mis-dated, so look at more than a few trucks in each year-group).
Tim
