Edited sentence: The 1969s were also the first to offer headrests as standard equipment due to a federal safety mandate, and the steering column with ignition switch that also locked the steering wheel with the transmission in "Park", a feature found on all 1969 GM cars one year before it became a federal safety mandate in 1970.The year 1969 also brought a major restyling to the Electra and other GM B- and C-body cars with somewhat crisper bodylines than 1965-68 models, but continued with the same chassis and inner body structure introduced with the 1965 model, along with the 126-inch wheelbase, which was upped by one inch to '127 with the mildly facelifted 1970 model