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The 7 and 8 wires should not touch anywhere. There is such a magnetic field set up, that it can cause the other cylinder to fire.
The Small Block Chevy has the same problem with 5 and7 firing one after another and being adjacent. (Ford and Chevy identified their cylinders differently, Chevy put all odd numbers on one side, and all even numbers on the other, while Ford just numbered 1, 2, 3, 4 on one side, and 5, 6, 7, and 8 on the other side. Check the manual on that one to be sure you're looking at the proper cylinders).
EDIT COMMENT: I've just been informed by Mark Weller, who runs a pair of Q-series small block Chevrolet based motors, that the Q has an entirely different firing order. See his post that follows.
This message has been edited by FEfinaticP on May 19, 2006 1:06 PM