Can someone tell me if a complete wiring harness from the titel discription on a 2×4. If it will fit a 4x4 same make. Hopefully this makes scence. On a atv

 

The late 450 had switchable 4WD so there will be wires and a different computer plug (ECU) for the 4WD mechanism built into the late 450 harness. Not certain, but I think the late CDI system was different too. Never seen a 2WD 450 but, if it exists, I would expect both 1998 harnesses to be the same, as the early 4WD was fixed and contained no electronics.