What year did the LA 318 come out?

1967 debut for the 318 LA, however the Poly 318 hung around in trucks much longer. I personally know of a '68 D-500 dump truck with the Poly, all factory, US-built. I think the 273 lasted until 1969, the latest one I saw had hydraulic valve gear (318 LA stuff). The 440 was exclusively luxury car replacement for the 413 that first year ('66), and the 360 was to supplant the 383/400 B in moderate weight big cars and trucks until '74 when the 340 was gone and a HP small block replacement was needed.