Just got a new Zex nitrous kit. Part number 82015 on comp cams website. Its just a dry kit and im wondering what i will need to change to run a 75 shot. Should i change the spark plug gap? or do i have to get new plugs? ALso should i get a fuel pressure regulator? What do i need to make this kit more reliable and safe. Also 91 octane fuel is a must correct?