For 1963, Catalinas and other full-sized Pontiacs featured cleaner, squared-off bodylines and vertical headlights flanking the split grille, but retained the same dimensions and basic bodyshell of 1961-62 models except for the rear flanks of the new coke bottle styling and due to this styling the rear track was extended to the 59 and 60 Pontiac's 64" wide track. Engine offerings were revised as the and versions of the 389 V8 were dropped in favor of "production" versions of the larger rated at with four-barrel carburetor, with Tri-Power, or a "HO" with Tri-Power . The Super Duty 421 was still offered to racing teams during the early portion of the model year but discontinued after General Motors ordered Pontiac (and Chevrolet) to "cease and desist" from factory-supported racing efforts in February 1963. New options for 1963 included a tilt steering wheel that could be adjusted to six different positions, AM/FM radio and cruise control.