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> AMC150-1 > Reground Crankshaft > 1983 - 86, 2-1/2" Neck, 10MM Flange Threads
AMC150 > Reground Crankshaft > 1983 - 86, 2-1/2" Neck, 11MM Flange Threads
AMC150L > Reground Crankshaft > 1987 - 96, 2" Neck