Presumably the Canada 77 model is the same as the US 77 one- the ultra-rare version with taller bars as well as the footrests and tank changes that you describe. The UK and Euro 77 one was indeed different in those respects.
You can change back the footrests to the UK type (you'll need all the footrest brackets as well), the gear linkage too, and the brake pedal, but you need to also change the brake lever pivot shaft (the bit that goes through the frame) as the splines are different.