If you need any other parts of the setup for your Mustang, I'll give you a pretty generic one that pulls in good times and let you make some slight tune mods from there.
With my set up you want to push through your low gears on non-stop NOS. If you are constantly shifting you are wasting precious acceleration time and wasting NOS. You will be shifting quickly, trust me, you just need the rest of my basic set-up and you'll uinderstand.