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The smallest-displacement engine of the 385 engine family, the 370 was introduced in 1977, replacing the 361 cu in (5.9 L) 360 Truck (FT) V8. Sharing its 3.59-inch stroke with the 429, the 370 was designed with a downsized 4.05-inch bore (shared with its predecessor and the 390 V8). For 1979, the engine was rebranded in metric, as 6.1 L. [2]
The engines for both cars are based on the 90-degree V8 engine from the Alfa Romeo Tipo 33 racing car, and have double overhead camshafts and a dry sump. The 33 Stradale engine has a displacement of 2.00 L (122 cu in) and a flat-plane crankshaft, while the Montreal uses an engine enlarged to 2.6 L (160 cu in) and uses a cross-plane crankshaft.
It featured a smaller bore of 3 + 3 ⁄ 4 in (95.3 mm) coupled with the same 3 in (76.2 mm) stroke of the 301 (same bore and stroke used by Chevrolet when the first small block motor was introduced in 1955). It produced 120 hp (89 kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile.