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Discussion Starter #1
I have a set of Pro Comp aluminum heads and the standard Autolite plugs don't thread deep enough into the head to place it in the optimum position for spark. The length of the threaded portion (reach?) is too short.

Does anyone know of a plug number, preferebly Autolites, that can thread in deeper that has a longer threaded section ?

Thanks-

Scott
 

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Try their web site. When I got my AFR's they had three different brands listed to use. Best I can do, not familar with them heads. Dave
 

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+1 the manufacture will know right off the bat. No guess work.
 

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autolite 3924s. almost all aluminum heads use a 3/4 reach gasketed plug.

I forgot you were the sparkplug man! :hihi:

Oops....double post! I tried to catch it! Sorry
 

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Those 3924 are very multi-faceted.
 

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That is why they call you "The Sparkplug Man"

:bowingsmilies:bowingsmilies
 
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