[Fat Charlie]

It's not about styling, it's about weight. Pick any random small car today and any random component on it is going to weigh less than its counterpart on a Falcon. Like the frame.

It'd be great to design and build your own car, but it's a horrible exercise in efficiency. Your best move is to start with something small and efficient and turn it into something even better. Weight reduction, aero and powertrain work can do amazing things without forcing you to design and build your own suspension- or make do with heavy vintage suspension.