Pulley holes has nothing to do with cast or forged dampers, but just the year. I can fit a symmetrical hole pattern pulley on any damper as far is also symmetrical damper setup, no matter if casted or forged balancing damper.

BTDT.

The pulley setup and sizes changed allong the years due the diff engines setup and equipments itself. Some diff diameters considerations came out also to the rotation speed "upgrades" made allong the years to the diff miscelaneous parts for the engine ( alts, AC compressor, water pumps etc...)