The larger surface-mounted C441 (WPT454) was used until '93; in '94, it switched to the smaller round inline connector. (Pump side: WPT330/WPT335; Truck side: WPT111/WPT807/WPT818 )
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For full instructions on the fuel pump access hole, see this:
See also:
MotorCraft 2016 Wiring Pigtail Guide 
