[PeteLeathersac]

You're correct also so is he being the answer is both!!!

I grew up w/ them here in Canada and yes it's confusing but w/ some exceptions think of the 62-65 Chevy-2 style Acadians w/ the top model line including Beaumont trim also the 64/65 A-Body Beaumonts including Acadian markings too!.
Things settled down for '66 and up w/ Acadians being the Chevy-2 cars and the A-Body cars being the Beaumonts..

Unlike Chevelles and Novas, L78's were not available as an RPO in any year Beaumont or 69-70 and up Acadian w/ the L34 the top dog although it's possible some L78 cars were factory built?.
And no '68 Acadian 'Gibb Copo L78/M40' cars either!.

Of interest too is L79 '66 Acadian (Chevy-2's) were built also I believe as 67's too but very few if so?.

There's been rumors of factory built '65 Z16 Beaumonts and '69 Beaumont Copo L72 cars over the years but as much as I know nothing concrete has ever surfaced on these?.

Again and as mentioned in previous threads here, 427 Beaumont (and maybe Acadian) Dealer transplants were built and delivered by a few dealers, Conroy and their 'Cheetah' cars for one!.
Which dealer built cars were L72 or L36 or even L78 equipped (again no L78 factory cars were available) is largely unclarified also to confuse things further some Conroy Cheetah cars were built and delivered w/ SBC's too!.

Included in the above don't miss the fact that 'Dealer built L72 A-Body cars were delivered in '66 and/or '67 model years...maybe other years too!.

Lastly, although sold at Pontiac dealers neither Acadians or Beaumonts were actually Pontiacs (regardless of being noted as such on GM Canada Vintage Services paperwork)!.

[img]<<GRAEMLIN_URL>>/beers.gif[/img]
~ Pete