Spark plug Cross reference

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    Author Topic: Spark plug Cross reference  (Read 1104 times)

    Offline cuda-cable

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    Spark plug Cross reference
    « on: October 12, 2005 - 06:54:15 PM »
    have a 73  340 ,headers, mallory unilite distributor, performer intake, 600 carb........I  got it with  autolite  #65  plugs in it? Does anybody know what a Champion  or NGK  plug is   cross referenced to this/  Also  i  have a manual  which shows a Champion N12Y  for 73  although they also call out a N9Y  for 1972.  I  guess I'm  just wondering where to start with a plug  for this combination? By the way  for those who responded prior to my header install question......thx......got one in from top/  and the drvr from the bottom.  Do you need to put a heat sheild on the starter or does it survive alright in the tight space with the headers?............thx.........d
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    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Spark plug Cross reference
    « Reply #1 on: October 12, 2005 - 10:58:24 PM »
    a heat sheild cannot hurt anything , & sorry I don`t have a plug cross reference
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    Challenger - You`ll wish You Hadn`t

    Offline mr_bill

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    Re: Spark plug Cross reference
    « Reply #2 on: October 16, 2005 - 07:40:58 PM »
    I don't know if this will help, but it is a very good reference on the way champions are numbered.

    http://www.championsparkplugs.com/images/champion.jpg

    Also, with champions and most domestic plugs, the higher the number, the hotter the plug. 

    An Autolite 65 is about equal to a RN12YC (I'm not sure how close)

    Good Luck

    bill
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    Offline ntstlgl1970

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    Re: Spark plug Cross reference
    « Reply #3 on: October 17, 2005 - 12:32:55 AM »
    http://www.ngk.com/ has a cross reference application on the page, just dump in your other brand plug part number and go.....
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    70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....
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