Here's the road numbers...
http://www.train-worx.com/quad.southern.list.htmThe numbers for the black cars are all Greeneville cars... which as built looked like this:

After the NS merger, these cars were resided by Johnstown in the mid 80's and repainted into the then current black Claytor scheme ad later the NS scheme.
Here's a pic of 77806

Here's a pic of the 78351

The red cars are all 79xxx's, which are four-bay Ortners (take the PM now Red Caboose five-bay Ortner and remove the middle bay)
Here's a pic of 79552:

Better shot of a car in the same series...
.JPG)