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Old May 21, 2017 | 07:25 AM
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Default Performance spark plugs
There are so many spark plugs to choose from 1.75 to prices that are unmanageable , I am looking for a good performance spark plug for my 68 427. Just bought Taylor SS Full Metal Jacket Braided Spark Plug Wires for my HEI . And before i put them on i also thought of changing my plugs. Just bought my car about 2 months ago and dont know the history of the plugs. Thanks...
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Old May 21, 2017 | 07:30 AM
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I like NGK V power.
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Old May 21, 2017 | 07:35 AM
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Me too!
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Old May 21, 2017 | 07:52 AM
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Originally Posted by resdoggie
Me too!
I looked them up on Summit Racing but cant find the engine specs for them.. I need them for my 68 427 HEI. Do u know which ones i will need?
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Old May 21, 2017 | 08:10 AM
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Google spark plug cross reference for the oem ac delco # for your engine and get the NGK plug #.
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Old May 21, 2017 | 08:15 AM
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Originally Posted by MikesRed68
Do u know which ones i will need?

Go to rockauto.com to look it up
Last edited by Dynra Rockets; May 21, 2017 at 08:17 AM.
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Old May 21, 2017 | 08:28 AM
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Originally Posted by resdoggie
Google spark plug cross reference for the oem ac delco # for your engine and get the NGK plug #.
I did but dont see ANYTHING about engines
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Old May 21, 2017 | 08:54 AM
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Don t waste money on exotic $12 Plugs.. good inexpensive set of Autolite Platinum will last 80,000 miles
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Old May 21, 2017 | 09:02 AM
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Originally Posted by MikesRed68
I did but dont see ANYTHING about engines
Go remove a spark plug and read the number.
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Old May 21, 2017 | 09:49 AM
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I like cheapo Autolites for my American V8's. Maybe $2 each?
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Old May 21, 2017 | 10:15 AM
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here is the NGK plug at Summit
https://www.summitracing.com/parts/n...model/corvette
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Old May 21, 2017 | 11:03 AM
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Originally Posted by MelWff
Ok great thank you.
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Old May 21, 2017 | 08:05 PM
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Nothing wrong with AC Delco Rapidfire. That's what I use. Keeping that great GM feeling!
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