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01-17-2008, 08:54 AM
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#1 |
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Registered User
Join Date: Feb 2007
Location: Marana, Arizona
Posts: 3,416
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Spark plugs for 70 350 w/ HEI
Hoping someone could shed some light , about to swap in an HEI and wondering about plug choices . Far as I know its a stock ls9 255hp 350
should I start with factory spec plugs ? AC ? thanks
__________________
"I feel the need for speed!"... as soon as I am done with my nap. |
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01-17-2008, 12:10 PM
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#2 |
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Registered User
 Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,190
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Re: Spark plugs for 70 350 w/ HEI
Use what is specified & set the gap a little wider like .045.
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01-17-2008, 02:45 PM
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#3 |
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Registered User
Join Date: Jan 2007
Location: South Florida
Posts: 158
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Re: Spark plugs for 70 350 w/ HEI
I'm pretty sure I am running AC Delco R45TS gapped at .045 and thats what the HEI calls for.
Rob |
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01-17-2008, 03:57 PM
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#4 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,495
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Re: Spark plugs for 70 350 w/ HEI
Can't recall which Delcos I am using, but they are the stock ones -- gapped at .045.
Been using this combo for quite a few years now...
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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01-20-2008, 12:22 AM
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#5 |
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Registered User
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
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Re: Spark plugs for 70 350 w/ HEI
i used basic autolite plugs, gap is set at .45. at autozone, i use the omnisaprk wires from a 79 chevy because they have 90 degree boots on both ends. never had a problem. HEI with 350, headers
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01-20-2008, 05:28 PM
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#6 |
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Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,038
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Re: Spark plugs for 70 350 w/ HEI
I have AC R44TS, gapped at .045 in a '71 Jimmy [350 '98 crate].
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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