6/3, 4/1 and 5/2 are interchangeable. The coil has a positive and a negative side. The only thing switching them will do is change the direction the electricity flows through the plugs/wires.

I wish I could post pictures to demonstrate. Pictures make it lots easier to understand.

Basically, the juice runs through one wire to the plug at the end, then across the spark gap to ground. Then, through the miracle of electricity it jumps across the paired cylinder's spark plug (backward, from ground to tip) and back to the other side of the coil via the 2nd plug wire.

If you ever notice that your plugs wear more on one side of the engine than the other, you can switch the wires (keeping the same 2 wires on the same coil) and cause the plugs on the other side of the engine to wear in the same manner.

The big joke is that you can double the life of your spark plugs by doing this, but I fugure plugs are too cheap to bother.

Clay