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Old 04-26-2012, 11:26 AM
cadmanof50s's Avatar
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Spark Plug Usage on Edelbrock Head

I'm thinking of using the Edelbrock 60909 cylinder head on my '68 vinatge 327 SBC.

Edelbrock recomends the use of the Champion Spark Plug:

"Use 14mm x 3/4" reach gasketed spark plugs. Heat
range may vary by application, but we recommend Champion RC-
12YC (or equivalent) for most applications. Champion RC-12YC are
1/4" shorter than N series plugs and may be required for header
clearance."

However, I want to use AC Delco instead. I'm wondering if the AC Delco R45XLS would work in terms of reach lenght? My concern is reach lenght and overall exposed lenght of the plug. According to what I've read the R45XLS has a reach lenght of 3/4" ...but does that include the tip or just the threads?

Any one have experience with these heads? What plugs are you guys using?

Thanks,

Vic

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Old 04-26-2012, 11:43 AM
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AC Delco 41-602, or Autolite 3924 which I have read works well.
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Old 04-26-2012, 11:49 AM
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Thanks for the quick reply, Ron.

I chose the R45XLS simply because they have teh 3/4" reach required and the heat range that I currently used.

I'll check into the plugs you listed.

Thanks again.

Vic
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Old 04-26-2012, 08:36 PM
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Spark plug conversion

Here are some plugs listed from a chart on www.angelfire.com. Champion RC-12YC, Autolite 3924, AC Delco FR1LS, and GM# 5614062

Last edited by cdminter59; 04-26-2012 at 08:37 PM. Reason: added more link
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Old 04-26-2012, 10:10 PM
cadmanof50s's Avatar
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Thanks cidminter,

its looking like the Autolite prodcut is the way I'll go.

The 3924 plug looks good. There is a 3926 plug which is one range hotter. Will pick up a set of both and try them out.

The R45XLS that I original considered won't work as the Edelbrock 60909 heads specifially ask for a 5/8" hex.

I'm normally very sticky about using strictly AC Delco plugs, but most posts I've read about the Autolite are very favourable.

Thanks,
Vic
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