L-78 Spark plug choice - The Supercar Registry

02-23-2008, 02:08 AM

Bill Rose Bill Rose is offline

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Re: L-78 Spark plug choice

I can't seem to be able to figure out which NGK plug (part#) would be used for a 69 L-78 application. I need a part number, so I can walk into an auto parts store, and order them from a 20 year old who thinks a Chevelle is made by Ford.

I found GR5, GR5GP AND GR5IX, for 69 L-78.... Any one know which would be the better one to use?

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