Did you keep the instruction sheet for you timing chain? If so, look at it and se if your chain had an "A" and "R" on the cam gear, if so, just line up the A with the dot on the crank gear. In addition to removing everything on the front of the car, radiator, water pump, it would also be a good idea to loosen all of your rocker arms to take the tension off of your cam (you will have to re-adjust when done, assuming they are adjustable. Advancing your cam 4 crank degrees will lower the hp and torque curves around 300 rpm, a slight but noticabe difference.