how do you line up the balance shafts to put the belt on...i see marks on each pulley but no real place to line them up.

 

The front shaft has a TDC mark, so that one's pretty easy. The rear one you're supposed to use a "maintenance bolt" - you unplug it from the back of the block & stick a longish bolt or rod in, then turn the shaft until the screw slides all the way in, then it's aligned.

But you don't have to use the maintenance bolt, if you look carefully there's a little V that matches up with a top pointer, and a little dimple about 120 degrees clockwise from it that matches up with a piece on the block.

The tricky thing is that it takes 3 rotations for that gear assembly to spin the balance shaft - if the shaft wants to "fall over" by itself, you're not on the right rotation. Turn it 360 degrees & try again. When you're on the right turn, it'll stay in place since the weights are at the bottom.