Head gasket "ratings"?

[4.whoa]

Does anyone know if head gaskets are "rated" for certain compression or boost psi? I recall seeing somewhere (a while ago) a gasket that said "up to 12:1 comp.
I know some of you guys run high comp. and others are boosted,and I think I read somewhere on here someone o-ringed their head. All the hg threads i've seen talk about thickness or bore size but nothing about this.On a thread talking about Garth Hill's dragster it said -he grooved .005" around the bores-I guess so the gasket fire ring had a little bite and wouldn't just push out. Also, how about nitrous? any certain hg to use for that? And i'm not talk'n bout a tiny 50hp shot ...I mean 150 maybe more I'm running a vr 54249 mls now...and love it(it's the only hg i've had on a jeep that didn't / hasn't "seeped" oil out the pass side)but how much can it handle?

I know there are a lot of you that run the heck out of these,so I'm lookin for your expertise

[lafrad]

The same design MLS gasket on other applications have shown that it can take STUPID amounts of power.

http://www.youtube.com/watch?v=PWn2-yQozMs
That magnum is running STOCK head gaskets... 392 stroker with 18 psi of boost.

I've never heard of a "blown" MLS gasket.

[4.whoa]

Cool, I didn't know it would be that easy. I'm going to get aggressive with my next build and just wanted to be sure.