This is especially for SilverBullit. My car has NGK TR55IX Iridiums, put in when my SC was installed. Is this the right heat range? I also have a set of Autolite copper 764's. Are these the right plugs for a SC set-up?
98.5 SVT, Vortech SC, Bassani, Quaiffe, Clutchmasters Stg. 3, BAT Sport Springs/Konis, 17" Momo Arrows, Sparco Brace,BAT 22mm Sway Bar, PIAA fogs & headlights.
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