Aja Kona Card (Migrating from G5 to Mac Pro Dual-Core)

I own a small video production company.

I am migrating from an old G5 to a Mac Pro Dual Core given to me. The Aja Kona card doesn't fit into the Mac Pro Dual-Core, as the card slots are different.

Any way to adapt the G5 compatible card to the Mac Pro slots? I would only use for importing older analog media, as the newer HD stuff we shoot is brought in electronically.

Thanks for any help you can offer.

DW