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Re: plugs and plug wires
Non-OE style plugs (e3' etc.) will have an impact on how it runs. Just not the way you want it to. But on the good side, 5.3 coils are easy to replace
The only reason to upgrade to low resistance wires, fancy plugs, or high power coils is if you have added boost. Otherwise GM has nailed down the ignition system on these and "Joe-Blow" can't make it any better
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Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card
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