Is that third unit a Family Lines?
Actually, it's a Seaboard System locomotive, Bob. This picture is a great precursor of the CSX merger that would occur in the next year or so.
DFF
EDIT: Now that I have looked at the photo again, I'm not so sure that the date is right. It's definitely Enola, but the first unit looks like it's been renumbered for the CSX merger, which, I believe, wouldn't happen until at least 1986. I guess the April 1st date should have given that away.
My guess is that this photo is from 1986 or 1987.