Welcome aboard. The numbers for the axle should be stamped on the front of the carrier. It can be either a 4.10 or 4.56 ratio. My sources do not show any differences for countries, so i would think that the numbers for the axle would be the same as US. The basic axle is very similar from '47-'72, with the main difference being the brakes and the gear ratios. An easy way to check the ratio if you can not find the numbers is to make a reference mark on the driveshaft, then turn it as some one watches the axle flange. then count how many turns it takes on the driveshaft to make 1 turn of the axle shaft. Aslo, I read your other post. If the truck is a 1/2 ton, the trans has been changed. The '54 was still torque tube drive (closed type). The tranny would have to be changed to work with an open driveshaft.
