change plugs for a 100 shot?
Again, you do not need to change your plugs. If you want to go through all of the hassle and play it extra safe then do it.
Myself among many others have run 150 or less on a completely stock LT/LS motor with no fuel/ignition changes and had no complications whatsoever.
I'm not alone in this thinking as there are several nitrous kit manufacturers that advertise there product this way.
Do what you want, it's your car. I'm not telling you not to change your plugs, I'm telling you that you don't need to. Have fun with it and be safe.


