Due to the larger body and revised front end styling, the 1969 models (but less so in 1970) had a notable aggressive stance. The 1969 models featured "quad headlamps" which disappeared to make way for a wider grille and a return to standard headlamps in the 1970 models.
This switch back to standard headlamps was an attempt to tame the aggressive styling of the 1969 model, which some felt was too extreme and hurt sales, but 1969 production exceeded the 1970 total.
Starting in 1969, to aid sales and continue the winning formula of the Mustang, a variety of new performance and decorative options became available, including functional (and non-functional) air scoops, cable and pin hood tie downs, and both wing and chin spoilers.