Start with first cam,exhaust driver's side, you dont need to remove the gear ,slip chain over gear and visually see that when its tightened down ,and rotated all the way therby removing slack ,that you can pin it.if you dont get it right mark chain to gear and remove , rotate position and reinstall, you will be correct when that cam is rotated all the way left removing slack and able to pin it , note the third cam intake passenger side may want to jump a tooth, slide a wedge between th chain an head to hold it till its pinned, the key is get all the slack out, but not moving crank out of 45 degree position