While having the original fold-down rear seats is a desirable and rare feature, it's a factory option from 1968. Pro Touring cars are heavily modified classic muscle cars that emphasize handling and performance, often incorporating modern suspension, brakes, and drivetrain components. They are built for spirited driving and track days, not necessarily for preserving total originality.
Your car is a highly desirable original example, but to become a Pro Touring car, it would require extensive modifications beyond its existing features.
