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Spark plug choice. What should I run?

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Old Jul 23, 2018 | 08:42 PM
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Default Spark plug choice. What should I run?
i have just rebuilt my72 LT-1. Its now a 355 with stock cam and heads. I'm running about 10.5:1 with pop-up pistons.
I installed R44t acdelco plugs. Is this good for street use or should I be looking for something else?

thanks
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Old Jul 23, 2018 | 09:44 PM
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That's what I run in my lt-1.
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Old Jul 24, 2018 | 08:19 AM
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Thoughts on extended tip? What gap should I have I gapped them .035? I'm running points with stock ignition.
Last edited by EarlyC34me; Jul 24, 2018 at 08:28 AM. Reason: Added gap question
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Old Jul 24, 2018 | 11:59 AM
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Seems the recommended plug is a TS not T, so R44TS. Since the rest of the ignition is stock, stick with the .035.
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