Complex sentence: The 1970 Javelins featured a new front end design had a wide "twin-venturi" front grille incorporating the headlamps and a longer hood, and a new rear end that sported full-width taillamps and a single center mounted backup light.
Split into simpler sentences: The 1970 Javelins featured a new front end design with a wide "twin-venturi" front grille incorporating the headlamps and a longer hood. It also had a new rear end with full-width taillamps and a single center mounted backup light.