289 vs 318 ..... Ford vs Mopar

The super charger option on the hipo 289 was offered in 65 or at lest early 65s. I read and article in Hotrod or Car Craft about a 65 with the super charger, the article said that it was factory installed. The owner had paperwork to show he ordered it with the car.
Correct. The GSS was the dealer (Mr Norm) installed.