Ray,
If you go to the Gulf Stream website and click on the Tourmaster section, then click on the T45G floorplan, you can download a brochure with all the specs and some pics of the TourMaster Constellation. It has the 400 Cummins engine which I believe is always a side radiator.
Here's a link to it:
http://www.gulfstreamcoach.com/produ...aster/t45g.htm
Ron