Looks to be possible another pro car beside it also.
The owner of the 'Vette' answered my note. The 'Vette' is a replicar built in about 2005.
The procars are a 1977 Cadillac Custom hearse. The ambulance is a 1974 Miller-Meteor.
This is all the info he sent in his answer. But now you know more than we did earlier.
Mike