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80cjinnc
06-18-2009, 07:19 PM
What type of plugs do you guys run? I am running a 401, MSD 6A, 10 to 1 comp., mild port on the heads, ect. I am running NGK GR4 right now, what do you think?
fuzz401
06-18-2009, 08:44 PM
autolite AR 3932 plugs gap them around .045 what I use in my 401
ol' school power
06-18-2009, 08:58 PM
NGK with the smaller 5/8 hex
80cjinnc
06-19-2009, 11:16 AM
Thanks guys...
BREK
06-19-2009, 05:19 PM
What type of plugs do you guys run? I am running a 401, MSD 6A, 10 to 1 comp., mild port on the heads, ect. I am running NGK GR4 right now, what do you think?

X2 on the ngk's I have been using them (with good results) for the past 6 years.
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