Not a Pontiac but the info may be of relevance to equivalent Pontuacs. This car was imported new into the UK:
VIN 1643971XXXXXX TRIM 843 TURQUOISE (Owner says Blue) PAINT DD-GROTTO BLUE (Owners says Nantucket Blue) BUILT NOVEMBER 4 1966 AND SHIPPED NOVEMBER 7 1966 MODEL 16439 IMPALA 4 DOOR HT
ENGINE K1027YB DEALER 97982 - NO RECORD
OPTIONS: A02 TINTED WINDSHIELD GLASS F40 HD FRONT AND REAR SUSPENSION (VAR 1) J50 VACCUUM POWER BRAKES M35 2-SPEED POWERGLIDE N40 HYDRAULIC STEERING P01 WHEEL TRIM COVER P79 8.25-14-4 PR TIRE - HWY- NYLON - WHITEWALL W89 TOUCH UP PAINT X14 EXPORT PREPARATION - COATING
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Automotive Historian, Author and Journalist Deputy Editor, VINTAGE ROADSCENE Southampton, England