After 15 years, the Fox Body Mustang was growing long in the tooth. Although still based on an updated version of the Fox Platform, the SN95 and New Edge styles took classic cues and tossed them in a blender with more modern design elements and platform improvements to create a Mustang ready for the 21st century. If your 94-04 Mustang is lacking in the power department, a Gen III/IV LS motor might be just what the doctor prescribed.