Car body Designer

[zeussy]

Not really, there will be a series of chassis, with pre determined wheel bases and track widths, the reason being:

Mazda 3 Wheel base: 2640mm
Toyota Corolla: 2600mm
Ford focus: 2648mm
BMW 1 Series: 2690mm
Vauxhall/Open Astra: 2614

Basically, all cars within the same size bracket are the same size. Apart from the BMW 1 Series, all the wheel bases are in a range of 5 cm.
Same is true for larger cars.