Just as tuning your customer's engine can make a dramatic impact on performance, so too can tuning the chassis. As an analogy, you could compare a car to a professional boxer. The level of conditioning needed to win in the arena is not merely power and speed — you also need agility and endurance. In automotive terms, that would involve properly setting up the suspension.
That's particularly true on older vehicles, in which the handling left a lot to be desired, even when new from the factory. Part of that was due to the state of automotive technology at the time of manufacture, along with other factors such as keeping costs down and keeping ride comfy. Hence, the control arms were made of stamped steel and cushioned with soft rubber bushings. The result was a car that was both affordable and comfortable, but swayed like a punch-drunk boxer with weak legs.The result is a classy car that preserves its classic looks, but works far better, with a greatly improved level of comfort for street and freeway driving and markedly better cornering ability.
These changes improve the balance, steering response, stability and safety, but don't require any modifications to the chassis for installation. All of which means your customers can make the most of their car's punchy performance and go the distance.