* Modifying the hood itself: Cutting, welding, and shaping to match the Caprice's fenders and grille opening.
* Modifying the car: Adjusting the firewall, fenders, or other body panels to accommodate the new hood's shape and size.
Essentially, using a hood from another car on a Caprice is a major body modification project suitable only for experienced custom car builders. There aren't any readily available "alternative" hoods.