Should these be at .045" for my engine? I think so, but what I don't know can fill a book 455 Buick, never decked, bored to 462 Stage 1 SE heads, stock Stage 1 valves TA 288-94 cam w/ 1.6:1 roller rockers 10:1 compression, forged stock type pistons 800 cfm carb Edelbrock performer 455 intake stock fuel pump one oddball oversize lifter :laugh: 1 7/8" primary headers I've always set my AC plugs to .040", but these are a beastie of a different color to be sure
Uhh Chris , You leave out the most important piece of information, ignition system?? If it's points, .035, HEI .045, MSD can go higher, but .045 is safe.
