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Got 143,000 on it, don't know if plugs have ever been changed, bought it at 85k.

Would the ignition coil need changing?

Should I put something like pb blaster on the plugs before pulling them?

What are the odds I break the wire tray?

I know about universal joint and extension on back passenger plug and using a string when removing old wires to pull through the new wires.

Any other tricks?
 
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