Canadian Pontiacs
As a Canadian and a car buff, I know all about Pontiacs in my childhood. As some truthfully mentioned, the full-size Pontiacs were Chevys under the skin. The exterior and instrument panel was Pontiac (with Chevy steering wheel and seats), but the chassis, engines and trannys were Chevys (ie 6 and small block V8, Powerglide). One giveaway is the wipers - the Canadian Pontiacs had Chevy's parallel-action wipers, instead of the symetrical-action ones on the American models. And the models paralleled the Chevys:
Caprice - Grand Parisienne
Impala SS - Parisienne 2+2
Impala - Parisienne
Bel Air - Laurentian
Biscayne - Strato Chief
Also, we didn't have the actual mid-size Pontiacs in Canada in the '60s. Instead, we had Beaumont, which was marketed as a separate make sold by Pontiac. This car was actually a Chevelle with a Pontiac-style grill and a LeMans instrument panel. And Pontiac sold another "make" called Acadian, which was virtually identical to the Chevy II.
Firebird was the first real Pontiac to come to Canada, then the Pontiac mid-sizers came over in '70, knocking off Beaumont. Then Ventura II came over in '72, without the "II" on the Canadian nameplate, knocking off Acadian. The name was resurrected as a Chevette twin. Astre was introduced here first, in '73, which was a Vega with a Pontiac grill divider and steering wheel. Pontiac gradually became more American as time went on. But as you can see, we may not miss Pontiacs as much as the US may, because we still have Chevys.
My family had a blue '66 Strato Chief coupe, with an inline 6 and Powerglide. It was a pillared coupe, just like the Biscayne. It sounded like a sewing machine at idle.
I know this is not the forum for cars, but I'm just answering the questions asked here.