The billet 9X11 has anti ballooning plates front and rear. Give us a call at the shop tomorrow and I will put you with Bruce so he can give you all the technicals on this. You need to be armed with facts from what it sounds like.
I don't have the billet 9X11,I have the standard one. I haven't been over 10# of boost anyway. If he has any ?'s I'll put him in contact with ya'll.
He hasn't tried that route,but just in case.