Cam Bearings P-3 Dura-bond fits GM 195 Pontiac eng/4cylbn4961-63. 287 Pontiac eng/8 cyl 1955 ,316 Pontiac eng/8 cyl 1956 ,347 Pontiac eng/8cyl 1957 , 370 Pontiac eng/8cyl 1958 ,389 Pontiac eng/8cyl 1959-66 , 421 pontiac eng/8cyl 1963-66.GMC (after S/N 336-35001) eng/8cyl 1959 ,336 (S/N 336-35001) eng/8cyl 1958-1959 ,347 Eng/8cyl 1957-59