Phoenix name replaced Ventura in 1978. Engine offerings for the abbreviated 1971 model year included a 250 cu in. six cylinder or 307 cu in., only the 307 was available for the Sprint option in '71. For 1972, a Pontiac-built 350 cu in. V8 with two-barrel carburetor was added to the option list and became the base V8 for 1973 and 1974. Transmission offerings consisted of a standard column-shift three-speed manual with options including a four-speed manual, two-speed automatic (with six-cylinder) or three-speed Turbo Hydra-Matic automatic (with V8s). The 1973 six-cylinder Ventura was the last Pontiac model to offer the two-speed automatic, a badge-engineered Chevrolet Powerglide, which was dropped completely from all GM cars and trucks after this model year in favor of the Turbo Hydra-Matic. A Ventura Sprint option package was offered on two-door models 1971 to 1975, including three-speed transmission with floor shift and optional 350 cu in. V8 equipped four-speed, body color mirrors, custom carpeting, all-vinyl upholstery with either the standard bench or optional Strato bucket seats, Custom Sport steering wheel, blackout-grille trim, special striping, blackout grille, and 14x6" (36 cm diameter, 15 cm wide) wheels. In mid-1972, Pontiac introduced the limited production Ventura SD for the Southern California market as sort of a sporty-luxury compact to counter imported luxury sedans then taking the U.S. market by storm. The SD option added the high-back Strato bucket seats from the Firebird along with a Custom Sport steering wheel, Rally II wheels, uprated suspension and other items. Some 250 Ventura SD's were built for 1972, all at the GM Nova/Ventura assembly plant in Van Nuys, California plant. In 1973, higher spec cars received a new split grille in the Firebird/GTO style. Lower grade cars retained the split level grille used in 1971 and 1972. The Ventura Custom became a separate series (2Z, versus 2Y for the regular Ventura), carrying a "Custom" script on the rear roof pillar. In addition to the two-door coupe and four-door sedan, a three-door hatchback coupe was added to the lineup. In 1974, the Pontiac GTO name moved to the Ventura from the intermediate LeMans line. The GTO package gave the basic Ventura a 350 cu in. (5.7L) engine with a four-barrel carburetor of about 200 hp (149 kW). The package also came with a functional "shaker" hood scoop, tri-color GTO decals, Rally II wheels, and special grill-mounted driving lights. The GTO package could be