Part Type: HVAC Heater Core. 2004 Ford E-350 Club Wagon Engine: 5.4L V8; EngineVIN: L; FuelSystem: Electronic; From 01/01/2004; Position: Front;. 2004 Ford E-350 Club Wagon Engine: 5.4L V8; EngineVIN: M; FuelSystem: Electronic; From 01/01/2004; Position: Front;.