I wouldn't recommend a dry kit. The only extra thing you have to do to install a wet kit is to run a line from the fuel solinod to the fuel rail and use the supplied fitting to get fuel for the nitrous system off the fuel rail, thats it. So really its not much harder to install.
A dry kit is also going to be more money as you will need a better fuel pump and injectors for it. Where as with the wet kit you can do it with no fuel mods at all for up to a 100shot. A wet kit is just as safe as a dry kit if not safer in my book because you know the nitrous kit is getting the extra fuel in. The only downfall is nitrous backfires which can still occure with a dry kit. Those can be avoded with a proper use of the nitrous kit by not using it below 3,000rpms so the fuel/nitrous doesnt have a chance to slow down and puddle in the intake manifold and backfire.
Trust me and the other tons of people who have been using wet kits on these cars for years. Wet is the easy cheaper way to go. Like i said any kit for a Ford efi vehicle is going to work and will be easy to install. Zex is very simple to install but doesnt offer the power that other kits do. The other kits arent even that hard to install at all. Most can be done in under 6 hours taking your time. I did mine in i think it was 4hours and change.
I can give you tons more info if you need be. I kinda like nitrous
