I just found this thread. Here's some stuff I have in the works.
This is an Impala with the Caprice trunk lid grafted in. Then I added the trim strip between the taillights.
This one has the "trough" filled with superglue and microballoons. This'll be a '96.
CMW Crown Vic, stripped, reprimed, and with modified Modelhaus Chevy cop car wheels. This'll be a Montana Highway Patrol cruiser.
LAPD used 2004 Impalas on an experimental basis, buying only a few cars. So I'm doing this one with Revell's snapper.
They're fun. I've got lots more, too.
Terry