Wet shot nitrous in a dry mainfold EFI engine is a recipe for disaster (or more specifically, a nitrous / fuel backfire).

Secondly... with 205K on the motor, I doubt your motor will take well to the increase in cylinder pressure. And if you have an automatic transmission, that's pretty much a deal killer.

Based on the numbers alone, I wouldn't recommend it.

While nitrous is not the time bomb some people think it to be, it use does carry risk and it puts stress on a number of parts. If you're not ready to replace or rebuild your motor, don't take the risk.