1991 Toyota pick-up timing belt replacement settings

how many splines away from to dead center should the timing mark be? this is a1991 toyota pick-up,v-6 3vVZ-E 4 =-WHEEL DRIVE. I LOST MY TIMING MARK ON THE CAM-SHAFT. I NEED TO KNOW HOW MANY SPLINES AWAY FROM TOP DEAD CENTER THE TIMING NOTCH SHOULD BE.