29 Years ago when doing a paid dyno session comparing the MSD 7AL to the Mallory Super Mag I asked the then general manager of MSD Harold Bettes which brand of spark plugs made the most power. his answer was
[8 that work]
In the time period since then we have done hundreds of back to back tests both for our own information and for customers that brought several brands in to test in there own engines.
Our conclusion is that Harold was dead on. Bill