To NOS or not to NOS
(Geoff87 hates when I say that)
But anyway....
The way I look at it, we all have different ways of achieving power. Some like to turn up the boost, some don't. Some like Nitrous, some don't. Using "nitrous" is a very effective way to make mucho power. Personally, I have a 6 port nitrous set up sitting atop my plenum. It looks very intimidating when people see it and, it produces a very big kick in the a$$, if you know what I mean. I don't use it too much because, well to tell you the truth, it's quite scarry. Also, I've read alot of horror stories and so the few times I've squeezed the juice out, I got flashes of pistons and rods spitting out of my oil pan and let off quickly.
I think nitrous works well/better as an aid for those who don't have enough stall and use a big turbo. It assist spool and (assuming you have a convertor with at least a moderate stall) can push you while you're waiting for the turbo to kick in. Guys with stock heads benefit well from nitrous too because nitrous is not dependent on flow to enter the cylinders but rather, it forces its way in via pressure.
Anyway, looking at your parts in your post that you have in your engine and giving my most honest, technically professional, expert opinion on hitting 9.20's using nitrous? Hmmm I dunno. (I'm just a lazy Hawaiian stuck on a rock in the middle of the ocean going 11's) Just make sure you have some kind of catchment system to scoop up your JE's and Eagle crank. HTH