offered most De Ville options on the Calais, such as Twilight Sentinel and the GuideMatic headlight dimmer. In 1965, the new Turbo-Hydramatic, standard on the 1964 De Ville, but not the lower-priced Series 62, became standard throughout the Cadillac line, including the Calais. The V8 also remained the standard engine. Pricing of the Cadillac Calais started at nearly US$5,000 ($ in dollars ), almost US$1,000 ($ in dollars ) (or about 25%) more than the Electra 225 and Oldsmobile 98, and about US$500 ($ in dollars ) more than the top-line Buick Riviera. In 1966, changes included a somewhat coarser mesh for the radiator grille insert, which was now divided by a thick, bright metal horizontal center bar housing rectangular parking lamps at the outer ends. Separate rectangular side marker lamps replaced the integral grille extension designs. There was generally less chrome on all Cadillac models this year. Cadillac "firsts" this season included variable ratio steering and optional front seats with carbon cloth heating pads built into the cushions and seatbacks. Comfort and convenience innovations were headrests, reclining seats and an AM/FM stereo system. Automatic level control was available. Engineering improvements made to the perimeter frame increased ride and handling ease. Newly designed piston and oil rings and a new engine mounting system and patented quiet exhaust were used. Head rests became an option. The Calais was extensively restyled for 1967. Prominent styling features were given a powerful frontal appearance with "forward-leaning" front end, long sculptured body lines, and redefined rear fenders that had more than just a hint of tail fins in them. The full-width forward-thrust "eggcrate" grille was flanked by dual stacked headlights for the third consecutive year. The squarer cornered grille insert had blades that seemed to emphasize its vertical members and it appeared both above the bumper and through a horizontal slot cut into it. Rectangular parking lamps were built into the outer edges of the grille. Rear end styling revisions were highlighted by metal divided taillamps and a painted lower bumper section. For 1967, power windows became standard on the Calais line, although power seats were still optional even in the 1970s models. Coupes got a new roofline, inspired by the Florentine show car created for the 1964 New York World's Fair, that gave rear seat passengers added privacy. As on that show car, the quarter window glass retracted rearward into a sail panel. New