by the sounds of what you want, you want a wet kit. I use a dry kit, but thats just me. you can use either a wet or dry... its up to you. i would go with dry becasue its cheaper. Check the classifieds, people sell whole kits there cheap.
NOS 5115 75hp dry kit. Its the best kit for the money. All you need to do is spend $6 more dollars for a bigger nitrous jet and you'll have a 150hp kit. Simple, easy, and proven to work reliably.