Sad but it's probably for the best. Hopefully it's just an easily solved issue once the new pulley arrives.
One thing I was thinking about, ...did you buy the AAM basic fuel return system for yours?
I know I did, cmck13 and Chris did. One of the elbow connectors was the wrong thread on one end so Tarmac Chris got us all replacements from AAM. If you had fitted this kit with the original supplied elbow then I'm certain it would cause a fuel leak, ...but not sure if it would have even gone together? Just a thought.
Got my belt today from that US eBay seller btw. Officially every part I need "pretty much" in my possession now.