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Well, I can tell you it's not off a Ford. According to my Standard's guide, Ford used Holley and Kingston carbs in those years. It may be off an Olds or Caddy.
Looked around but couldn't come up with exacts on your carb, but everything that I hit on with a google search leaned more toward that being an old outboard boat motor carb.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.