I have run 2 meters 144-148MHz equipment from time to time.
Most popular options on a Vette of C4 vintage (assuming it's a coupe) are:
Through glass magnetically coupled antenna. External antenna is removable and so is the glue if you change your mind. Just don't put near rear window defrost embedded strips.
Second option, is to fab up a bracket in aluminum or stainless that you could mount up under the bumper to a bracket and extend out from the rear fascia. Again removal with no apparent signs of damage.
I haven't looked behind the license plate but there may be an option there as well.
Good Luck,
Mike, N4ACB, Advanced Class