Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#2
02-23-2008, 07:27 AM
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Re: L-78 Spark plug choice
OK guys!
While we're at this topic, what would be the correct NGK plug for a '69 L/89? Nuch
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#3
02-23-2008, 08:28 AM
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Re: L-78 Spark plug choice
Try NAPA. Forget about Advance, Carquest, Pep Boys, etc.....
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Craig S. "I saw Elvis At 1000 Feet" John Force.
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#4
02-23-2008, 08:44 AM
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Re: L-78 Spark plug choice
I've always run the AC43N plugs in our L78 with zero problems. About 20K miles on the last set. NGKs lasted in our old snowmobiles when nothing else would. Everyone who uses them like them.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now. 
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#5
02-23-2008, 08:02 PM
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Re: L-78 Spark plug choice
Sorry I'm late to the party...maybe I need to make an NGK plug reference post a sticky? LOL!! Anyway...
5671 is the gasketed plug for the 840 head ('69 & earlier) UR5 is the tapered seat plug for the 291 head (late '69 & later) I run a 5671-7 in our Camaro...the -7 part is the heat range, and NGK plugs are rated backwards of most plugs in that the bigger the heat rating number the cool the plug...Autolites are 'ok' plugs, but stay away from Champions or AC's...
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#6
02-23-2008, 09:29 PM
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Re: L-78 Spark plug choice
Autolite number 26, never had any problems ever. Not only is it fun to watch the "counter information engineer" look up a 69 chevelle 396 375 horse, try telling them it has a 427 and watch the fireworks.
  
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1969 Baldwin Motion Chevelle SS427 Phase III CLONE, RECREATION, TRIBUTE, etc.
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