I want to thank everyone for their input. It gave me some ideas for things to check on.
I have used the Dayco top cog belts but that made no difference.
One thing I will try is a smaller crank pulley. The one on the car now is a large diameter.
I have watched the pulleys when the car is running and I didn't see any that were wobbling.
I mentioned earlier that I used a strait edge to align the alternator pulley with the crank and water pump pulleys so I don't think the issue is there.
I will try a smaller crank pulley and possibly a tensioner that I found on Mancini's website.
I will post what I find.
Thanks again for your help!