Block casting numbers: 959

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UP TO 3-YEAR, 100,000 MILE WARRANTY INCLUDES PARTS & LABOR

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General Motors 7.4L Marine Engine 1973-90

GM 7.4 / 454 Reverse rotation rotation, Mark IV, 2
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General Motors 7.4L Marine Engine 1973-90

GM 7.4 / 454 Std rotation, Mark IV, 2 pc rear seal,
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