[Goatracer1]

In 20 years I have never changed the plugs in my GTO. It has Jacob's ignition module and HEI magnetic pickup.

[STEELCITYFIREBIRD]

Highly agree on plug wires and all secondary ignition parts take quite a beating from a MSD box. Especially the coil wire from what I have noticed on my own ride.

[HWYSTR455]

Originally Posted by Goatracer1

In 20 years I have never changed the plugs in my GTO. It has Jacob's ignition module and HEI magnetic pickup.

I ran the 'blue' Jacobs boxes exclusively, the coils, and wires. When they got bought out, they were 'corporate' offerings/quality. I bailed.

Silicone is silicone, it breaks down over time, dang acid rain and crap! Heh-heh! I bet if you turn all the lights off, and run the engine, you would have a light show!

Lisle Tools used to have a tool that would kinda measure corona of plug wires, get one. Compare what new wires make that light flash over used ones. You will be enlightened.

https://www.amazon.com/Lisle-26900-S.../dp/B000CODRMM


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[STEELCITYFIREBIRD]

Run your hand near the coil wire of a car running with a MSD box... and be careful where your jnk is parked while reaching!

I was enlightened....dynamically!