Belt" warning light and buzzer for 1975, and owners were now permitted to disable the starter interlock on their 1974s. 1975: Following the discontinuation of the Galaxie series after 1974, Ford sought to fill its place by expanding the LTD trim lineup. Above the Custom 500 was the standard LTD, the LTD Brougham, and newly introduced for 1975, the LTD Landau. In an effort to comply with pending rollover standards (as well as to differentiate it from the Mercury Marquis), the two-door was converted from a hardtop to a coupe with wide B-pillars and a tall, narrow "opera window" (Chevrolet did the same thing with the 1974 Caprice Coupe). More or less the Ford counterpart to the Mercury Grand Marquis, the LTD Landau featured rear fender skirts and various decor packages for additional luxury; it was distinguished by the return of hidden headlamps (exclusive to its trim level). Hidden headlamps were also shared with the LTD Country Squire wagon. The 429 engine was replaced by the 460 V8 sourced from Lincoln-Mercury for 1975. A catalytic converter now required the use of unleaded fuel, and the gas gauge and fuel filler sported warnings to this effect. 1976: Four-wheel disc brakes and 8-track were optional. Last year for LTD Brougham trim level. 1977: Since the LTD Brougham had been discontinued, the LTD Landau received the former Brougham interior as the base offering. Optional interiors, including the LTD Landau Luxury Group, were still available. 1978: Final year for 121-inch wheelbase LTD, as it is replaced by the downsized Panther-platform generation LTD for 1979. 1973-1978 Ford LTD Police Package & Police Interceptor Package: 1973-1978, Police Package contained a 351/400 CID motor for city patrol cars, while the 460 Police Interceptor was for heavy Duty and high Speed use. The 460 Police Interceptor motor was rated at 260 Net horsepower and capable of 0-60 times in the 8 second range. Quarter mile times in the upper 15 second bracket, and top speeds in excess of 135 Mph. 1975-1978 Ford LTD 460 Police Interceptor "C code" Approximately 7,850,000 full-size Fords and Mercurys were sold over the 1969–1978 period. This makes it the second best selling Ford automobile platform after the Ford Model T. Mechanical Details For the first time since the 1940s, the full-size Ford line was powered exclusively by V8 engines. The base engine was the 302 cid V8. The next largest engine was Ford's