Which way do i go? I want to retard it 4 degrees.

Why would you want to retard a cam? That almost never works out well.

Unless you know it's installed way ahead of where you want it. NEVER, EVER trust the marks to do what you want. Always verify.
THIS!! Most of the time you want to crank them ahead. Retarding a cam starts to kill bottom/ mid range and raises the HP peak