Bridging The Gap
Some Corvette engine combinations like a bunch of gap and others don'trun well until the gap is tightened up. A gap of approximately 0.025inch is commonly used, but some combinations (particularly those withhigh-powered contemporary ignition systems) can fire a gap ranging from0.045 to 0.060 inch. In all situations, the gap, air/fuel mixture, andheat range must be coordinated to produce the best possible results fromthe engine. In simple terms, it's a case of trial and error coupled withthe correct reading of the spark plugs.
Conclusion
Once you have the correct heat range dialed in, the gap sorted out, thespark plug type selected, the jetting squared away, and all of the othervariables inside your Corvette handled, there is no need to continuemessing with the plugs. The idea is to get your combination set upcorrectly, and to use the spark plugs as a tool in the setup. Onceeverything is right, no magic power will be found in the spark plugs. Remember, they're the window inside your Corvette engine. Don't forgetthem.