The Charger was redesigned for 1968, and an initial 35,000 units were slated for production. The demand was high and 96,100 Chargers were actually produced. Based on the Chrysler B platform, the model years received various cosmetic changes to the exterior and interior including: an undivided grill, rounded tail lights, and hidden headlights. The powertrains were carried over from 1967, but the 225 cu in (3.7 L) slant-6 became available in mid-1968. The Charger was not successful in stock car racing such as NASCAR. A more aerodynamic shape formed the Charger 500 model that became the basis for the 1969 Charger Daytona.