Please check notes in each part listing to ensure the Fuel Cap Tester Adapter is correct for your 1977 PONTIAC BONNEVILLE BROUGHAM with a 5.7L 350 4BBL engine. STANT & GATES are competing brands, and each brand's Fuel Cap Tester Adapter may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Fuel Cap Tester Adapter fits only certain 1977 PONTIAC BONNEVILLE BROUGHAM models.

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