I built a port system for my coupe at Bonneville years ago using NOS nozzles. Starting with 13 to 1 compression I did not see as much additional power as a friend who did it on an 10 to 1 motor. Did gain about 8 MPH.
Nitrous is essentially a blower in a bottle and everything you do for a tune-up for a blower you do for nitrous.
Make sure you have a way to retard your ignition when you push the button. 5 to 7 degrees worked for me. MSD's and others can do this. I also dedicated a separate fuel pump with no regulator.
Took a 20# bottle for each run holding it down for about 2-1/2 miles..Good Luck
