Got my 68 almost ready now , just put new hoses and power steering pump on it
Here's my question What V-belt goes where, as I don't think they were right to begin with..
You can find pictures of the belt routing on Google.
I found over the years that I had to adjust the position of several of the components to get lazer straight belt paths. Even the water pump pulley can be moved forward using shims from places like Hughes Engines.
One of the ways I learned to verify that the pulleys are lined up is to stand back 6 to 8 feet from the car and sight down the pulleys like you would with open gun sights.