Size of wire??

[NewHemi]

And depending on your computer(if using one in your car), if everything is chassis grounded, you will have nasty litle transient spikes all over the place..

Chassis ground what isn't sensitive and set up a separate ground with out chassi interference.

If you arent using a computer in the car, just chassis ground everything with good heavy ground wire.

David
The New Hemi Guy.