Call NGK they were super helpful and I was running too cold (9) of a plug and explained why to me. Also you want to run a resistor type plug with fuel injection. He also told me a projected tip plug weather copper or irdium would work way better boosted and fuel injected then the ngk non-resitor plug I had in it.

Im 8:1 iron heads, intercooled and run 93 pump up to 15psi
I run my timing thru a msd 6al2 programable and build my own curves. I dont start pulling timing until 5psi and pull 1 degree until 10psi and then 1.75 until 15psi