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Back in 1963, Motor Trend awarded its Car of the Year trophy to Rambler. Here's a photo taken in happier times of several fresh aluminum blocks during machining. The blocks were made for AMC by Doehler-Jarvis Division of National Lead Company and contained 53 pounds of aluminum plus 14 pounds of gray iron cast-in bore liners. Our junkyard discovery block is stamped S30915, so it was manufactured about halfway through the (approximately) 60,000-unit production period.