When applied to a 1964 Mercury Comet, "Pro Touring" means the classic car has been extensively modified to match or exceed modern performance standards, especially in areas like suspension, brakes, drivetrain, and comfort features. Generally, these modern features include:
Upgraded suspension and steering components for improved handling and cornering.
Enhanced braking systems, often with modern disc brakes.
Performance-oriented engine and transmission, optional fuel-injection, making the car far quicker and more reliable than stock.
Modern tires and wheels selected for grip and performance rather than vintage appearance.
Added comfort and convenience upgrades, such as air conditioning, power steering, and sometimes even infotainment systems.
Safety features like roll bars, fire suppression, and reinforced chassis may be added for track or autocross use.