Ritwik,

You cannot ask "do we need design X or design Y for this year?" The answer could be: don't run a turbo.
If you know how to calculate mass flows through a nozzle then you know what you need to do! You will have some inlet diameter D1 based on your air filter size, you have an outlet diameter D2 (in your case 22.63mm) and you have a minimum throat diameter (20mm, or 19mm if you are running E85). The length of the restrictor (and, if not known, D1) is then determined by packaging constraints and CFD analysis.