Considerations for a motor running N2O

[Alpine TSi]

Besides the regular machining and precuations for building a motor are there any other things I should consider for a motor that is going to be running nitrous?(and for those who don't understand nitrous I mean NAWZ!!!111)

I am planning to almost always use pump gas on this motor as it is my daily driver and I really don't feel like having to run and get race fuel just to have some fun on the freeway. And please hold the comments back on this one but I have no intentions on using any other size turbo than my current EVOIII16G. I know it may sound dumb, but I don't want one of those uber laggy popcan swallowing turbos that are found on the local 500 and up hp cars. Plus the motor is only a 2.0. I currently enjoy full spool by 3700 RPM, mainly thanks to a perfectly ported head(thanks mike!). I don't want to sacrifice that in the least. But I do want to break 400whp, hence the spray.

I will be running some less aggressive pistons compresssion ratio wise in order to run 20-22 psi on pump with the appropriate fuel mods. I really want to only build this motor once as I am not loaded financially. I have already picked the shop the shop that will build it(they don't know yet), and want to go there with everything in hand and a good idea of what needs to be done to block to hold up with my plans for it.

Shane had mentioned getting the block o-ringed(or something like that) in order to keep all that spray in the chambers. I am not really sure what this does as I am an internals noob. I will be running a 50 shot that may be upgraded to a 75 if I decide it is needed.

Are there anyother considerations I need to look at inorder to get the most out of this block? Any and all POSITIVE feedback is appreciated.

Thanks in advance,
Matt