ok so your going to need to use your imagination here a little
but i think youll get the idea.
the bumper cover in the pic is a spare i have, so if youd like to try it out lmk.
its not perfectly aligned, but im pretty sure there will be a gap here permanetly.
the back pin and clip/nut thing line up in the back.
left finger area would need to be drilled to allow the other pin to come through.
right finger just needs that clip/nut moved to the left where my finger is.
hope that helps a little.
without a couple extra sets of hands i cant get a picture with the caprice hood and grille
to show how they would match up.
my guess is youd have to modify the grille a little for a stock look.