Here's why:
* Aerodynamics: 1970s cars were not designed for high-speed stability. The aerodynamics are significantly less efficient than modern vehicles, leading to instability and increased wind resistance at higher speeds.
* Tire Technology: Tires from that era were not designed for the stresses of high-speed driving. The risk of tire failure at those speeds would be extremely high.
* Suspension and Chassis: The suspension and chassis were not engineered for sustained high speeds. The car would likely become unstable and difficult to control.
* Engine and Drivetrain Limitations: While the 350 engine is powerful, it's not necessarily geared for top-end speed. The drivetrain components (transmission, differential, axles) would be under significant stress at 120 mph, increasing the risk of failure.
* Safety Features: Safety features in a 1974 Buick Regal would be minimal by today's standards. The risk of serious injury or death in an accident at 120 mph would be extremely high.
In short, while theoretically *possible* under extraordinarily perfect conditions, attempting to reach 120 mph in a 1974 Buick Regal would be incredibly dangerous and irresponsible. It's far more likely that the car would experience mechanical failure or become uncontrollable before reaching that speed. Any anecdotal accounts claiming to have done so should be viewed with extreme skepticism.
