Is this a Warrior?
Powered by a German Ford V4 engine?
Manufactured by Vanguard Products Inc. of Dallas TX - an air conditioner manufacturer c.1964?
No, but it is indeed
Ford engined!
Previously you said: "The advertisement clearly states that this home-made car is power by a not so common engine thanks to their product." Is this perhaps an indication that this car is some sort of hybrid powered by a "not so common engine" via this product? For example: the engine drives a hydraulic pump which in turn drives a hydraulic motor(s), or: the engine drives a generator which in turn drives an electric motor(s). In these examples the sponsoring company would produce hydraulic pumps/motors or generators/motors respectively.
Not that complicated. It is not hybrid, it uses Ford engine.
I am not sure if this is a demonstrator vehicle built by the company or individual. I tend to choose the second option.
Not getting into much tech details, the main product of this company is used for engine swap, as far as I understand. This is why I told that the car uses other engine, instead of a common VW.