I know for 4-cylinder'* nitrous can be a problem because of the weak internals. But looking at our engine, if you do not run a super large shot, I think we should be ok. As in the engine will be harmed at all, or very little. Similar in theory as to why Lingenfelter Vette'* can run high boost with little problem.

Just like every car. It can only hold a certain shot before something goes out. Ive seen Preludes with a 150 shot on them. So if your setup is right you will be fine just as long as you dont abuse the button.

Where would a good place for the Nitrous shot be after the intake for a N/A car? Or would a tube mounted just past the MAF screen work? I personally do not see a way to get into the TB, without welding/drilling.

After the MAF would probably be fine for you. I'd say keep the spray to about a 75 shot right now, your internals are strong, but not wonders. If it'* your daily driver, start at around 50 shot, and work up.