That truck sure is a beauty. A '64 and if it has a 409, it would be a C-80.
Here are some pictures of Emblems from Jolly's site, including the Toro Flow:
http://6066gmcguy.com/emblem.html
My '67 7500 with the 6V-53 still had the Toro Flow Emblems on the butterfly hood. It was what it once had before it got converted.