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The Pontiac GTO is a front-engine, rear-drive, two-door, and four-passenger automobile manufactured and marketed by the Pontiac division of General Motors over four generations from 1963 until 1974 in the United States — with a fifth generation made by GM's Australian subsidiary, Holden, for the 2004 through 2006 model years.
In 1935, Pontiac re-introduced their six-cylinder engine, as a 208 cu in (3.4 L) straight-6. The 208 was produced in 1935 and 1936. It was a side-valve design with a timing chain, as was popular at the time. This engine featured a conventional one piece cylinder head, and the distributor was moved to the side of the block.
For the 1969 model year, the 350 V8 engine came as 265 hp (198 kW) 2-barrel and an optional 330 hp (246 kW) 4-barrel version. The ten horsepower increase over 1968's engines was due to a different cam and the use of the #48 big valve heads, the same head used on the Ram Air 3 400-cubic inch 366 hp (273 kW) engine and the 428-HO engine at 390 hp ...
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It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge.
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.
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The Custom S came standard with Pontiac's unique overhead camshaft OHC-6 175 hp 250 in 3 engine. Also available was a 230 hp (170 kW) 265 ft⋅lbf (359 N⋅m) TQ OHC inline 6-cylinder with the "Sprint" package, a 265 hp (198 kW) overhead valve pushrod V8 350 in 3 , and a 330 hp (250 kW) version of the same engine with higher compression and a 4 ...