360 spark plugs for racing?

I run Champion RV12YC4 plugs, gapped @ .045.
I use MSD6AL box & coil.
I have used them in my aluminum headed 360 & iron headed 340.
Both engines run 11.20's, the 360 with 32 degrees of timing & the 340 with 35 degrees.
No problems at all, I change them at the first of the race season & forget about them.