Centering crank pully on damper

[JMD]

I have a generation IV 454 in my '68 K10. I installed a new damper and reused the original crank pully before the engine was installed in the truck. The damper didn't wobble at all when the engine was running, but the pully did. Not a terrible amount, but enough to make the belts dance all over the place above 2500 rpms. After about 1000 miles one of the pully bolts sheared off, damaging both the pully and the damper.

I installed another new damper as well as an aftermarket crank pully. Once again the damper is perfectly centered, but the pully is slightly off. Only by 1/16" or so, but it's very noticeable at higher rpms. What am I missing here? How do I get the crank pully perfectly centered?