two-barrel with a 9.0:1 compression rated at at 4,000 rpm and at 2,400 rpm, and the four barrel with 10.25:1 compression, rated at at 4,000 rpm and at 2,800 rpm. It was only produced through 1967, being replaced by the new small block in 1968. 350 Buick adopted the popular size in 1968 for their final family of V8 engines, the 350, which was produced through 1980. Although it shared the displacement of the other GM small blocks, including the Chevrolet 350, Oldsmobile 350, and Pontiac 350 (although the Pontiac was technically a 354), the Buick blocks were of a substantially different proprietary company design. The Buick 350 featured the same bore as the version of the Buick 90° V6 and retained the stroke of the previous V8. The exact displacement is . The major differences of the 350 in comparison to other GM V8s are Buick's "deep-skirt" engine block construction, the use of cast iron with increased nickel content, an external oil pump, a forward-mounted distributor, under-square cylinder bore sizing, crankshaft main journals, and connecting rods. The Buick 350 also shares an integrated aluminum timing cover, which incorporates the oil pump mechanisms, leaving the oil filter exposed to oncoming air for added cooling. The engine garnered a reputation as rugged and durable, and some of its design characteristics are found in other Buick-designed GM engines, such as the V6 and its 3800 descendants. Of all the GM "350s", the Buick has the longest piston stroke. This design characteristic made the engine significantly wider than the others — essentially the same as the Buick big-blocks, which have the shortest stroke of the GM big-blocks. The 350 was used by Kaiser-Jeep and AMC Jeep in the Jeep Gladiator and Wagoneer models from 1968–71; in these applications, the engine was billed as the Dauntless V8. 1968-1972 Buick Skylark 1968-1972 Buick Sport Wagon 1968-1971 Jeep Wagoneer 1968-1971 Jeep Gladiator 1971-1973 Buick Centurion 1971-1980 Buick Electra 1971-1980 Buick LeSabre 1973-1975 Buick Apollo 1973-1977 Buick Century 1973-1977 Buick Regal 1975 Pontiac Ventura 1975-1979 Buick Skylark 1977-1980 Buick Estate 1977-1978 Buick Riviera Buick big block Buick introduced a "big block" V8 in 1967 to replace the largest displacement nailheads. It retained a cylinder bore spacing, and was produced in three displacements, 400, 430, and 455, through 1976. 400 The was produced from 1967-1969. This engine has a bore and a stroke of . It was the