L90D fuel pump timing

i have to send out my injection pump for some work.
I know i need to put the motor and pump back in time when installing the pump.
Also know that im supposed to have this position indicator timing light position tool from volvo to do this aswell. I dont have this tool and im not spending 780 bucks to buy it for one time use either.
Does anyone have any advice on installing this pump? I havent removed it from the machine yet and i dont plan on removing it until im sure i can reinstall it....

L90D fuel pump timing

L90D fuel pump timing