1. If USA built after 1963, if it came with a 6 cylinder, the VIN should have an I (eye) as the first digit.
2. The VIN you have reads 3/4T long bed, built in Oakland, CA, 1962 year. USA built.
3. The USA built GMC's had only V6 available until 1964, then a straight 6 was offered as an option. Not a 235 though.
4. Canadian built GMC was a clone of a Canadian Chevy, which was a clone of a USA built Chevy. No V6's. Straight 6 only.
Yours has a transplanted motor or is possibly some sort of hybrid. Double check the motor. Give us the stamped motor ID. Also, state what type suspension you see in rear to see if it's a Chevy chassis. (Canadian)