I'm in the process of removing injector pump from a blown motor. I can't get the motor to turn to get pump to TDC before pulling the gear. What are my options if I pull it as it sets, which is about 90° out. I assume TDC is for timing of the pump. If the pump is reinstalled on a working engine, would I install it the way it came off, 90° out, or is there a way to time pump to TDC once it is removed.