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Old Aug 13, 2018 | 05:04 PM
  #21  
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From: Frederick Colorado
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I got them off the "e" of The Bay.


Hi! I found this on eBay and thought you might like it! Check it out now! http://r.ebay.com/fu7PQK

$21 shipped.

BTW, totally killed my radio problem, just like Bill C said it would. Gaps of all new plugs were .045 inches. In accordance with GM'S notice to people who buy them, I did not attempt to adjust the gaps to 0.40".
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Old Aug 13, 2018 | 05:41 PM
  #22  
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Some wire kits are sold with the metal shields... the shields make it very easy to pull wires without damaging them. I use both the metal shields and a cloth heat shield which keeps the wires very well protected.
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Old Aug 13, 2018 | 06:50 PM
  #23  
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Originally Posted by FOGeologist
...Replaced all plugs with the Delco 41-110 Iridiums ($20 delivered, factory originals sealed in NOS packaging)...
Originally Posted by FOGeologist
I got them off the "e" of The Bay.

http://r.ebay.com/fu7PQK

$21 shipped...
I followed your link, but it says "unbranded" and the picture doesn't show ACDelco anywhere. They just say 41-110

Last edited by GCG; Aug 13, 2018 at 06:51 PM.
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Old Aug 13, 2018 | 06:53 PM
  #24  
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From: Frederick Colorado
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Originally Posted by GCG
I followed your link, but it says "unbranded" and the picture doesn't show ACDelco anywhere. They just say 41-110
they are AC Delco plugs in the original package.

Last edited by FOGeologist; Aug 13, 2018 at 06:53 PM.
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Old Aug 16, 2018 | 09:53 AM
  #25  
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For a close to dead stock engine as noted by Bill and others above just go with the AcDelco stock replacement Iridium spark plugs.

Now as a side note only and not to confuse the OP, for my warmed over LS6 based engine in my '99 FRC with 410 rwhp, I am running the one (1) heat range colder than stock NGK TR6ix Iridium plugs.
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Old Aug 16, 2018 | 10:07 AM
  #26  
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Just an FYI, DENSO is the OEM supplier for GM small blocks.

OEM's mandate that plugs be branded with their OES brand (i.e AC Delco in GM's case)
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Old Sep 4, 2018 | 06:23 PM
  #27  
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I was told, because of the mods to my engine, that I should go to a colder heat range plug. Been searching for AC Delco heat range information but can't seem to find it. Anyone have a link to a source?
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