(5 photos of a 1970 Competition Yellow Boss 302 Mustang Fastback) Competition Yellow 1970 Mustang Boss 302 fastback owned by Jon Jackson from Illinois. This was our featured Attitude Of The Week for March 16th, 2008. Jon's Boss has Magnum 500 wheels, Boss stripes, a shaker hood scoop, rear window louvers, and front and rear spoilers. That's Jon inside.