You may want to set your water/meth kit to turn on under boost automatically, this way you if you forget it don't matter. Colder plugs for sure. Change them at the track if you find them fouling on the drive there. Do you have a spark plug magnifier? You will be surprised what shows up that you can't see by naked eyeball..

51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them