all the kits you listed are good. As far as accuracy of the HP ratings...TNT tends to under rate thier kits. NX and Zex seem to over rate just by a hair. But again...be careful how you percieve this little fact. If you put a TNT 100 shot on your car and you end up getting 125 actual RWHP...guess what...its a 125 shot. Nothing is free in wear and tear on your car. Just becuase the jets they say are a 100 will net you an actual 125 doesnt mean your still getting only 100 hp of wear and tear on your motor. If you put an NX kit on your car and thier 100 jets get you an actual 85 shot...then you have an 85 shot and a good starting point to know what size jets you will actually need to achive 100 or 125 if thats what you wanted. Jets are inexpensive....dont limit yourself to the three HP sets that come with a kit.

For a small size wet kit that you are looking for I would not hesitate to buy any one of those kits. I do prefer TNTs nozzles. But the ZEX setup seems to work very well.

Also..the rpm range that your motor has combined with its small ci displancemt...makes you a perfect candidate for a dual stage setup. You will get alot more miles out of that motor spraying a heavy dose of nitrous by basing your nitrous flow by rpm....especially with a manual tranny.