i am only guessing that mine might be a `62 build, but it could even be a `63. ??
going by the serial number it should be the 455th 6-230 cab chassis out of Toledo. i think have seen somewhere the build numbers for america but i cant find it right now. looking at the id plates and the numbers i think that the number on the black plate will be the number as they came from the toledo factory and the blue australian plate will be the assembly number as they were put together in brisbane.

that would make mine the 455th out of Toledo and the 24th out of Brisbane.
yours would be the 1298th out of Toledo and the 106th out of Brisbane.