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04-22-2019, 02:56 PM
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#1 |
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Registered User
Join Date: Apr 2018
Location: Highbridge
Posts: 38
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Chevy c10 spark plugs..
Hi all. Ive got 68 c10 with a mid 70's 400ci chevy motor. It was already fitted, it has edelbrook performer heads and inlet fitted. Im looking to buy spark plugs and every 400 ci engine listed i can find seems to take shorty reach plugs. The one fitted are autolite 3926 which have .750 reach..could this be because of the heads being changed or is there a year they where fitted. Im in the uk so limited information thanks in advance
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04-22-2019, 03:12 PM
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#2 |
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Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,661
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Re: Chevy c10 spark plugs..
Edelbrock's recommended spark plugs for their heads are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. Plugs should be gapped to 0.045" for HEI and 0.035" for points.
__________________
72 C10 lwb fleetside -stock 350/350 combo |
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04-22-2019, 03:46 PM
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#3 |
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Moderator
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,158
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Re: Chevy c10 spark plugs..
Agreed with 68 P.O.S....correct on all points....
Standard Chevy 400 heads do take shorty plugs, however, Edelbrock use the 3/4" reach flat seat style. 
__________________
Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox 
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04-22-2019, 04:17 PM
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#4 |
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Registered User
Join Date: Apr 2018
Location: Highbridge
Posts: 38
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Re: Chevy c10 spark plugs..
That explains it. Thanks for your help
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