Fuel Pump Rebuild Kit - Olds 1955-58 (4317 Pump) Fuel pump rebuild kit for 1955-58 Oldsmobile 324 and 371 V8 engines with AC 4317 dual action fuel pump. Kit contains all necessary seals, gaskets, springs, valves and diaphragms to rebuild both fuel and vacuum sections of your pump. Since the dual action fuel pumps used by Oldsmobile in this era are all very similar in appearance, we recommend checking the unit number of your pump (typically located on the pump mounting flange) to ensure you purchase the correct rebuild kit.