But this conversion is basically just a Tesla model 3 with the shell taken off and a mustang shell installed over. It's mostly a model 3, including the heavy battery and drivetrain. And airbags.
I guess there's probably still one in the stock Tesla steering wheel/unit.
You also have none of the heavy structure that makes it so you don't die in a rollover or side-impact in a modern car. Look at how skinny that A-pillar is.
Hell, half of this interior is just the raw exposed sheet metal with no insulation/noise-dampening/softer materials either.