As others have pointed out Canadian GMC trucks had Chevrolet drive lines. So a inquiry for GMC info.
will turn up US spec stuff.

There is good information from folk that have Cd. knowledge on this site.
Some of us have GM of Canada service and parts books. No reprints for these.

Is your truck a single wheel? or Dual wheel? In 50 the brakes were still Huck brand, Drums will be hard to find.
Bendx came in a year for light units and another couple for the larger trucks.
If your engine is tired, a full pressure 235 or 261 would be a wise improvement. Look for a Cdn. Pontiac six.

Keep those One Tons rolling! Lots in Alberta.
Howie




1 1955 Chev one ton. 261 engine

3 1962 Chev c-10 261 engine
4 1966 Plymouth VIP 5.7 GenIII Hemi
5 1966 Imperial Crown Coupe 440 engine