Welcome Byron!
Granny gear plus 4 makes it a 5-speed...5 forward gears.
Can't speak for the Canadian trucks but the 348 V8 introduced in 1958 was only available in the 90 and 100 series US built trucks. All of the other smaller series trucks got the 235, 261 or 283 engines. The 60 series had the 261 standard and the 283 optional.
Mike B
