Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
in NSW it is illegal to not have it and it will get defected or fail a road worthy on as the exposed metal with sharp edges from the second skins are considered a hazard and dangerous. had a car failed on a pink slip a few years ago for those very reasons.
My VC has no headlining, carpets, soundproofing but does have door trims. Painted floors and painted underside of the roof as GM only undercoat the inside of the roof. You must have door trims to prevent injury from the openings inside the door, the trims can be made from virtually any material. My car was certified by an engineer for several mods and no comment was passed regarding no interior trim and it passed roadworthy. Also there is no rear seat, mountings or seatbelts and registration now states 2 seats. So you don't need to run full interior trim.
See this is what I assumed was correct all along. I know door trims are a must, but carpet, roof lining, etc all can go. Do you still have a complete dash and center console?
I had my aircon vent off on the drivers side and a place didnt want to give me rego, go figure.
My VC has no headlining, carpets, soundproofing but does have door trims. Painted floors and painted underside of the roof as GM only undercoat the inside of the roof. You must have door trims to prevent injury from the openings inside the door, the trims can be made from virtually any material. My car was certified by an engineer for several mods and no comment was passed regarding no interior trim and it passed roadworthy. Also there is no rear seat, mountings or seatbelts and registration now states 2 seats. So you don't need to run full interior trim.
I have the top half of the dash only and no heater core, for a demister I use a 12V hair dryer. I have no centre console but I do have a rubber boot around the gear lever and all the factory holes in the floor are plugged. Rear windows are fixed and winder mechanisms removed. Only 50% of windows need be operative.