305A was standard in 1000–3500 series trucks in 1960-1961 and was dropped in 1962. The 305D was an option in the 1000–3500 series in 1961 and became standard in 1962, replacing the 305A. The 305E replaced the 305D in the 1000–3500 series trucks in 1963 and was used until 1969. The 305B and 305C (a 305B with a different manifold and carburetor) were used in 4000 and 5000 series trucks; the 305B was dropped in 1962 while the 305C continued to 1974. 351 The 351 had a bore and stroke. The 351C produced gross at 3600 rpm and gross at 1600 rpm, while the 305M produced gross at 3700 rpm and gross at 1400 rpm in 1969. Introduced in 1960, the 351 was available as a C series, an E series (351E), and Magnum series (351M). The E and M series featured a larger two-barrel carburetor and an open port intake, bigger intake and exhaust ports, larger diameter valves, and larger exhaust manifolds. The 351E did not use the same parts as the 305E. The 351 or 351C were used in some 4000, 5000, and 6000 series trucks from 1962 to 1972 and the 351E was used in the 1000–3500 series trucks from 1966 to 1969. The 351, 351C and 351M engines were medium duty truck engines, while the 351E was a light-duty engine - basically a 351M without the oil-driven governors. In 1973, the 351 was replaced by the 379 cubic inch V6. 379 The 379 had a bore and stroke. It produced net at 3600 rpm and net torque at 1600 rpm. The 379 was a 351 with a 478 crankshaft. 401 The 401 had a bore and stroke. It produced gross at 3400 rpm and gross torque at 1400 rpm while the Magnum version introduced in 1966 produced gross at 4000 RPM and gross torque at 1600 RPM. The engine was further enlargement of the 351 and was produced from 1960 through 1972. This engine was used in the 5500 and 6000 series as well as the H-5000; it was an option in the W-5000 and SP-5000. 432 The 432 had a bore and stroke. In 1973 & 1974 It produced net at 3200 RPM and net torque at 1600 RPM in 1973. There was also a version with enlarged crankshaft journals. The 432 was a 401 with a 478 crankshaft. The 432 was a Magnum engine