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The real surprise is under the hood. Yep, that's a Chevy 265 small-block, and no, it wasn't swapped in. While U.S.-built '55 Pontiacs were powered by Pontiac's new 287-cube Strato Streak V-8 (which evolved into the mighty 389, 400, 421, and 455), Canadian-built V-8 Pontiacs got Bow Tie power (also all new for '55). This practice predates GM's late-'70s corporate engine sharing scheme and accounts for the existence of crazy Canadian hybrids like the '67 Pontiac Beaumont S.D. 396, which was essentially a Chevelle SS396 with a north-of-the-border twist. The original generator, stock single-pot brake master cylinder, and dusty Rochester two-barrel verify this original-paint Chieftain's unmolested condition.