Ignition noise after installing ground run?

[Vortec Stroker 10+ year member]

I installed a ground run back to the battery in an effort to lessen the dimming etc., and afterwords have noise from my ignition system getting through into the signal. The RCA's are passing over at a 90* angle of both the power and ground runs of #2 whip welding lead. I should also mention that I run a Jacobs aftermarket ignition. So what should I do to fix it?

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