Screech at 70mph.

As the car is finished, I took her out for her inaugural spin. Forget about the 2200 miles I have put on it so far, it was not finished.
I had her on the freeway for 70 some miles. Between 65 and 80 mph. At one time going 80mph, I kicked it down to the floor and she took off, not lacking any power. I am pleased.
About 5 minutes before I got home I noticed something. I had not heard the screech/whistle the entire trip.
I have done a bunch of little things. tied up wiring, played with this and that. The only major anything was moving the alternator forward 1/2". But I did hear the screech after I did that.
Interesting, looking at the fan belts before and after I moved things, what use to be 1/2" too far back is now about 1/4" forward of true. I am not touching it.
Before it was noticeable, now you have to look for it