Rebel- your ATI balancer fit with no issues? When you say you have the ATI extended balancer I presume the hub is deeper than their standard unit. You have a part number for it? My standard ATI balance doesn't seem to fit properly.

What are the part numbers for the belts you are using? I have a Goodyear version but it's a bit too wide and will probably shred on the crank pulley if run this way.