I was (and still am) using the Gates Blue racing belt. The one I suspect was brand new a year ago. I replaced the one that was on there as a "just in case". I put the one I took off a year ago, back on. And had to retard the camshafts 7 degrees to get them straight up (where I started last year).
Tomorrow I'm going to measure the belt that I took off against a used stock belt. A see how much difference there is. I would normally put the original belt back on just to recheck it. But the arthritis is really bothering me (if the pain gets better in the next couple of days I probably will).
Here's a pic of the front of the motor.
