The Perth Regiment was never motor, it was a standard infantry battalion, though in an armoured division. The "Motor' distinction only occurs in armoured divisions and therefore only happened twice for Canada: The Lake Superior Regiment in the 4th Armoured Division and the Westminster Regiment in the 5th. Of the two, only the 5th Division fought in Italy (the 4th landing in Normandy after D-Day). As you say, the shortage of infantry in Italy often led to armoured car or motor battalions being converted from their original role.
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