mlander Posted August 28, 2006 Share Posted August 28, 2006 Finding the correct sparkplug is a real chore sometimes unless you have a car newer than 1950.This is for an AC G series from a sparkplug chart in an old Audels book dated 1951. Primarily for Pontiac but may apply to Chevy but not Buick. If anyone is interested I will print the whole thing if I can. Yours M.L. Anderson.Directly form 1945 AC Chart & a Chart on the Internet.Cold at the top and progressivly Hotter toward the bottom!AC 1945 interchangeable chart!AC G-1, G-1 ½, & G-2 replaced by AC-81 Champion No # noneAC G-2 ½, G-3, & G- 3 ½ replaced by AC 82 Champion #D-6AC G-4 ½ & G-5, replaced by AC-83 or 83-S Champion #D-9AC G-6 & G-7 replaced by AC-84 Champion #D-14AC G-8 replaced by AC 85 AC G-9 & G-10 replaced by AC 86 & 87-S Champion # D-16AC G-11 & G-12 replaced by AC 87 Champion # D-21This plug G-12 is standard on 1930 &1931 Oakland V-8s.AC G-13 & G-14 replaced by AC 88 Champion # D-23 Link to comment Share on other sites More sharing options...
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