The Stovebolt Site Forums The Shop Area Engine Shop fan belt question: need one the next size DOWN

On my 350, the original fan belt size was 45013/10A1145.

Because the crank pulley was making contact with the oem crossmember in the truck, I had to go with a smaller crank pulley. I basically need the next belt size down from 45013. Can anyone help me to determine what replacement belt that would be? It's a V belt.

Thanks!