V-8s, but the three-speed Turbo Hydramatic could be ordered with all V-8 engines on the Impala Sport Sedan and Custom coupe. "Astro Ventilation" was an option for the Custom Coupe that included fresh-air vents, the same units that were used for the optional air conditioning, sans the center upper vent. Cars equipped with this option got full-length door glass minus the vent windows. 1969 The 1969 Impala and other full-sized Chevrolets were restyled with crisper body lines and front bumpers that wrapped around the grille and ventless front windows were new on all models. The 119-inch (3,023 mm) wheelbase, inner body shell and framework were carried over from the 1965 model – along with the roof lines of pillared four-door sedans and station wagons. The station wagon was renamed the Kingswood - reverting to a pre-1962 Chevrolet practice of using different nameplates on wagons than other models. Inside, front seat headrests were now standard equipment due to a federal safety mandate and the ignition switch moved from the dashboard to the steering column and doubled as a lock for the steering wheel when the key was removed, a Federal mandate that took effect with the 1970 models but introduced a year earlier on all General Motors cars. The instrument panel was restyled and highlighted by a new steering wheel. The 1969 Impala also offered a new GM-designed variable-ratio power steering unit as optional equipment along with a seldom-ordered "Liquid Tire Chain" option, which was a vacuum activated button that would spray ice melt on the rear tires (UPC option code is "V75"). The standard engine was enlarged to a 235 hp (175 kW) 327 cubic-inch V8 with optional engine choices including a new 350 cubic-inch Turbo Fire V8 rated at 255 and 300 hp (220 kW), a 265 hp (198 kW) 396 cubic-inch Turbo Jet V8, and 427 cubic-inch Turbo Jet V8s rated at 335 and 390 hp (291 kW). The L72 425 horse power engine was available in all B-Bodies. All V8 engines were now available with the three-speed Turbo Hydramatic transmission for the first time though the two-speed Powerglide was still offered with the 327 and 350 V8s. During the 1969 model year Impala production, including Kingswood wagons totaled 777,000 units, compared to 166,000 Caprices and Kingswood Estate wagons, 68,700 Biscaynes and Brookwood wagons, and 155,700 Bel Airs and Townsman wagons. Impala totals for 1969 included 768,000 produced