Big Block headgaskets - steel shim for racing?

The engine is supposed to be 9 to 1 compression and the pistons are at zero deck. I was planning on a 125 shot of nitrous when I come off the transbrake at 3500 rpms , and I have a dana 60 w 4.10 gears and 29x10 tires.

I called Mopar tech and the guy was like " well those gaskets are performance.. because they are thin to increase HP ... they should be fine "

I don't want to sacrifice durability or coolant leakage to gain a 1/2 point in compression since I can add more than that through the nitrous. Does anyone here use these type gaskets for racing ? how about a better reccomendation like the fel pro or detroits or cometics ?