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GMC V6 and V12 Engines Engine repair and rebuilding |
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#1
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What kind of spark plugs are you using for the 351E (1966 GMC 2500 in my case)? The manual calls for an AC C44NS which far as I can tell is no longer produced. The auto parts store cross-referenced this to a Champion RN14YC (also called type 405) but in what little I've been able to find online I've also seen an RN11YC specified. I know the difference is heat range, but is that a 3-plug difference in heat range? Which one is ideal? What are typical plugs used for this application today?
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#2
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I use NGK plugs in my 305E...I'll get some numbers for ya.
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"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#3
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I used NGK Iridium from Advance Auto #6637 in my 1966 GMC 3/4T Pickup with a 351 V6.
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Clyde McKaba Abbeville,SC 1961 GMC Suburban 4WD 305 V6, 4spd 1966 GMC 3/4T P/U 351 V6, Turbo 400,Gear Vender OD 1969 GMC Suburban 1/2T |
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