The 318ci. GMC 6cyl. gas engine belongs to the Heavy Duty Line of GMC Trucks, for years '50-about '59, also in this group is a 360ci, 426ci, 503ci., & a 707ci, all inline 6 cyl. engines. Catch ya later, Spanky Hardy.......Collector Of Fine Old G.M. COE Trucks & antique Holmes Wreckers
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