When it is on TDC the balancer mark is at zero and I have the timing set to 17* or 18*. So when its running the balancer mark is just barley visible up by the water pump. I have my balancer marked at 10* and 20* so at 20* timing it would be on the zero mark. Its on the drivers side. The distributor rotor is pointing right now the center of the engine well maybe just a little bit toward number 1 cylinder.