personally, I ran the brisk silver 14s on my 06 with 76mm turbo. I had absolutely no problems idling or driving. I even ran them on the car for a week before i got my tune and turbo on with no problems.
On a business stand point, we have run them on the hemi applications and 3V's with no problems. I haven't gotten any feedback from our 5.0L guys that run them.
For big power i would definitely use the brisk over the autolite/FRPP plugs. The projected tip on those plugs can be easily melted off on high horse power cars.