trick photography, in the 1960s, when there was NO digital special effects, it was all exacto knives, layers of physical film, and steady hands

Yup, that isn't a car, that is a toy model that was photographed and then worked into another photo with lots of hard work, and no computer help

here is the model. Back when computers were room size calculators that had to use punchcards.

https://www.hotrod.com/articles/backstage-1962-shelby-breedlove-roth-stanley-mouse-mickey-thompson-jet-cars-dobie-gillis-first-ford-mustang/