Not with me. I had a 2001 Duramax with the shiney heads and they were never a problem. I had the truck juuuust a little over 600hp for a while too.
That Dmax engine had 48 head bolts just like the Scorpion does so clamping should be fine.
I would say that unless you start feeding exotic fuels or just get crazy with power enhancements, the heads will be a lifetime part on this Scorpion engine.
I will say too that the aluminum head will transfer excess heat away from itself faster than iron would. That should be a good thing I think.