You were right cravnpup, there are those that would disagree about the use of nitrous...
In my opinion ANY type of forced induction increases wear on the engine. Supercharger, nitrous, or other...
The key is in the tuning and the amount of boost\shot you are going to use.
You hear of all these nitrous horror stories because you get many folks who don't know too much about cars strapping on a 200 shot on an engine with a stock bottom end.
(I've seen a lot of ricers with nitrous "issues" at the track...)
The key word hear is detonation....
avoid it like the plague, as it will eat your engine for lunch.
Keep your engine running well and use high (93) octane fuels and you should be fine for a small hit of giggle gas.
To be honest, in my opinion a well tuned 4.6 should be able to handle a responsible dry 75 shot now and again.
I am a convert of dry shot systems on near stock cars, while they don't produce the hp numbers that wet kits do, they're a heck of a lot safer for your engine.
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"The Yellowjacket"
1998 Mustang GT
13.97@103
"Hey, you weren't supposed to be that fast!"- Turbo Eclipse Driver