given the power difference at the same engine speed. The 292 would be the longest-lived of the Y-Blocks, carrying on until 1962 in U.S. cars and until 1964 in U.S. trucks. It was also used in Argentina in the F-100 pick-up well into the 1960s, and was known as Fase I (Phase I). In 1971, the engine was modified to accept a new-style cylinder head with a different valve arrangement (E-I-E-I-E-I-E-I versus E-I-I-E-E-I-I-E), new intake and exhaust manifolds and was renamed Fase II (Phase II). In this form, the 292 Fase II continued into the 1980s in the F-100, and was also used in the Argentine Ford Fairlane (built from 1969–1982, and based heavily on the U.S. 1968 model). All Argentine versions of this engine feature a cast crankshaft rather than the forged example that equipped US heavy-duty engines. The 292 version was also produced by Ford of Brazil and equipped the Brazilian LTD starting in 1969. Both the 272 and 292 engines were replaced on Brazilian cars by the 302 windsor family engine starting on 1976 model year. 312 The V8 engine came out for the 1956 model year and was again used in high-end Ford and Mercury cars, including the Thunderbird. Bore x stroke dimensions were . Depending on model year and application, the 312 was available with a single two- or four-barrel Holley carburetor, two four-barrel carburetors and with or without a McCulloch (Paxton) supercharger (1957 only). All 1956 U.S. Mercury models were powered by the V8 breathing through a four-barrel carburetor. At the beginning of the model year, a version with 8.0:1 compression ratio powered Mercury cars with manual transmissions (including three-speed plus overdrive), while a version powered cars with automatic transmissions. The 225-horsepower version had an 8.4:1 compression ratio. Later in the model year, a version with 9.0:1 compression ratio became available. All 1956 Mercury engines had gold-painted blocks and heads. The 210-horsepower version had red valve covers and air cleaner, while the 225-horsepower version had blue valve covers and air cleaner. The 235-horsepower version had argent silver valve covers and air cleaner. A dealer-installed "M 260" engine kit was released in January 1956. The kit consisted of a hotter camshaft, revised cylinder heads, and an intake manifold mounting two four-barrel carburetors. The kit was advertised as boosting the Mercury 312 V8 to . Not generally known, about 40% of these 312s were equipped with