I have also the Trumpeter kit on the shelf waiting..
But ,as Stephane told me, the Trumpeter kit is different in many points:
Look at the kit an look at the picture.If you look carefully, you will see that the cab as a different shape in the front,and on the side.Also one version (i don't remember wich one) is water cooled while the other is air cooled( different layout for motor) and the biggest difference ( i hope you like to scrathbuit here!) is the trailer.The one in the kit as 6 axle and the canadian use the 4 axle version with bigger tires.
I'm in the process of collecting more information for the project( yes, i will try to do it !!)and will come back if i found something,
keep modeling !!!!