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Old 08-02-2017, 03:11 PM   #10
Harley03joe
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Join Date: Apr 2016
Location: Miramar Florida
Posts: 153
Re: need help with spark plug choice and tapered or flat

Quote:
Originally Posted by davepl View Post
Just installed Autolite 3922s which are a 5/8 washer plug. That was in an aluminum head, but they do exist... this is a cold plug for a turbo motor, 3924 would be the normal heat range I think.
Dave Is The Spark Plug In My 87 R 10 Chevy Silverado 5.7 K Eng 14 MM Thread ??
Thank You
Harley03joe
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