The only thing I do with Champion-plugs if I find them anywhere in my engines or garage, is to toss them as hard and far away as possible.

I'm using Accel-plugs in every bigblock I have, 'cept the Eddy-headed stroker motor I run now, and never had any problems with them whatsoever.
Heck, I can't even remember when the last time was I replaced a set of these yellow buggers in an engine anymore.

Why Accels?
Well next to their immaculate state of operation, the price is also right. I get them kinda for free.