They aren't really like any thing Irish from the 1970s/80s era. If you want to repaint them I would suggest avoiding the Supertrain/MkIId liveries, but go instead for the earlier livery as applied to the Cravens coaches. While not terribly accurate, the models would be representative of some of the stock for the era you want and you could run them with the Cravens. I'd suggest numbering the two coaches 1432 and 1433. These were 7-window standards dating from 1956 but which were still in service in the mid-1980s. The arrangement of toilet windows was different, with small winfows at each end alongside the entrance doors. Also, the large windows on the models look like sealed units whereas the originals had sliding lights at the top like those on the Cravens. For the van, use the same colour scheme and number it 2557. None of these vehicles would have carried the white line under the windows, only the original one above them. Hope this is of some help.