The Boss is truly one of the most famous Fords Mustangs of all time, and every Mustang freak and his brother has sought to put one in the garage. This passion has held strong from the Classic days up through present, with many one-offs posted by the aftermarket, but none have been fully blessed by FoMoCo. The lingering lust for a high-powered pony car with the Boss lettering has Mustang fans grabbing at any possible concept they can fathom in order to reproduce the legacy of the Boss Mustang experience.  Now, Jon Kaase and his crew have taken their best shot at recreating a Boss monster–and yeah, they have a winner here, folks. With an output of 800 ft-lbs of torque and over 900 horsepower, this S197 Mustang means business…because it’s truly the Boss. Take a good look at the Kaase Boss Nine 589ci 2008 GT Mustang and witness how it became a fire-breathing thoroughbred. (more…)