Not every restoration is to original specs. Sometimes you want to upgrade various systems/parts in order to improve the performance of a vehicle.
In the video below, a 1941 American LaFrance Fire Truck gets a new brake system. In this case, presented by Jay Leno’s Garage, an innovative induction brake system requires some major re-arrangement of the vehicle’s innards to install this system. These brakes have a lifespan of 4-5 years, versus the much shorter life span of traditional brakes in commercial vehicles like fire engines.