TRUCK ENGINES: 2003 5.7 Truck engine with “Cross Over” ignition wires 2006 5.7 Truck engine with individual coil packs per cylinder COIL PACK DIFFERENCES: BELL CRANK THROTTLE: 2003 5.7 Truck engine swap with Mopar bellcrank 2003-2004 5.7 Truck engine  Mopar bellcrank