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Camaro Research Group Discussion => Maintenance => Topic started by: 69z28fan on June 26, 2019, 06:37:42 PM

Title: 1969 396-375 AC Plug
Post by: 69z28fan on June 26, 2019, 06:37:42 PM
Can someone tell me what the correct plugs are for a 1969 396-375. Will R43xls work in this motor?
Title: Re: 1969 396-375 AC Plug
Post by: WorkinProgress on June 26, 2019, 07:12:13 PM
R43 is the correct plug for iron heads. Not sure what R43XLS is, but the R43XL is used with aluminum heads. XL stands for extra long threads.

                                      - Warren
Title: Re: 1969 396-375 AC Plug
Post by: WorkinProgress on June 26, 2019, 11:32:42 PM
Made a mistake. R43 is a 302 spark plug. R43N is the correct plug for 396/375 with iron heads. R43XL is for aluminum heads.

                                              - Warren

Title: Re: 1969 396-375 AC Plug
Post by: 69z28fan on June 27, 2019, 10:03:58 PM
Thank you.
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