Building a vehicle for a movie that is purpose built not for highway use is different than building one that meets all highway safety requirements. No offense to Lonny for the design and build quality of the movie Goblin, and I'm certain he and his team spent a lot of time making sure the one-off build for the movie met the requirements to ensure it completed its assigned role. But I would bet a steak dinner with anyone that any vehicle built that doesn't have a direct physical connection between the steering wheel and the steering gear - excluding those manufactured vehicles that have (somehow) got a pure electric steering past the DOT - will not pass a state inspection (where state inspections are required) for an assembled - kit car - vehicle. For states that don't have this level of inspection, you would be taking a chance that a hydraulic steering only system would not have any problems and be reliable (and safe enough) to not cause any issues. I would venture that any issue caused that resulted in an accident - and God forbid caused any injuries or worse - would be the focus of an investigation and be open to litigation. This is my humble opinion and can be taken any way one likes, no offense is intended.