Those three Park cars were never refurb'd back when the fleet first got HEP - around 1990-92. They sat out of service (in Ottawa, iirc) for many years before VIA finally sold them off as surplus. So they likely didn't turn a wheel after the late 80's. I don't know why those three were omitted from the HEP program - they may have been in the worst shape, or they may have simply been chosen at random because the HEP program and the post-HEP Silver and Blue service plan didn't require as many Park cars going forward.
Some of the photos that are going around show interior murals that look like they date from the original build - I had thought that all the original murals had gone to the National Museum - I hope we are not losing those!
While I'm sorry to see any of the fleet go elsewhere, the Fort Wayne group is a very professional museum who know how to keep equipment in top shape. There are far worse places for the car to end up, and I'm confident the group knows what a treasure they have acquired. So it's a good news story in some ways.
- Paul
PS - If anyone is looking for old equipment consists, the Bytown Railway Society's Branchline publication has posted consists observed for many years. Someone with access to back issues may be able to find when the cars were last spotted in service.