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This is the round-about explanation of why wider gaps (usually) make more power: you can run a richer mixture and get it burned, thereby making a little bit more power. These wider gaps can also help give your engine better throttle response
Right you are, but remember, the ignition system has to be able to produce sufficient voltage to run a wider gap. On those early HEI GM cars, you could see on the scope that it was taking 25kv to 30kv to spark. 20kv was about max for non-HEI. Also once the plugs (fuel) fouled on an HEI car, you had to take 'em out to clean or replace, on a standard (for the day) ignition, if you got it started, the plugs would clean up on their own.
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well Papa, on a related suject that you've discussed before, today i side gapped a pair of NGK's. I'd been using irridums and got a definate increase in midrage performance. Not huge of course, but esily noticable when A/B'ing them with stock plugs.
Side gapping works. You'll have a reduced plug life, possibly a significant reduction, you'll just have to see. But these plugs are cheap and easy to get to. 
Contra todo mal, mezcal; contra todo bien, también
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