This month, I gutted the engine bay of my '66 Mustang, project Street Fighter. With all the parts on the ground next to the car, I could really inspect them and think of how they could be improved.

As purveyors of modified Mustangs and Fords, we’re always looking to change and improve every aspect of our favorite cars. Oftentimes people focus on the big-ticket items like paint and wheels, and ...