spark plug guide

Old 12-03-2007, 06:37 PM
  #1  
altune
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Default spark plug guide

Ok I know this is a stupid question. Who has or how to go about getting the correct spark plugs for the application?
I have a customers bbc corvette with a 502 BBC with ported world products heads. I have a set of plugs that came out of it but don't know if they are correct. I understand how toi determine heat range etc but is there not some deal with plug depth etc?
Also am I supposed to use resostor plugs with resistor wires?
Al
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Old 12-03-2007, 08:37 PM
  #2  
Racefab57
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NO resister plugs with resister wires!
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Old 12-05-2007, 10:49 PM
  #3  
cepx111
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We run the ngk's plugs in our 496 merlin headed bbc part # 5673 in the number 8 heat range.
$!.99 per plug at napa auto parts.
Goodluck, Charles
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Old 12-31-2007, 05:57 AM
  #4  
bigs1975
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Is the NGK 5673 plug a .460 thread reach plug?And will this plug work in BBC990 heads.They have Autolite 133's in them now.Just trying to find the correct plug also.
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