My '80 Fleetwood has rusted out on the radiator support under the battery.I went to the local u-pull-it yard and they said the '83 and '89 Fleetwoods they had would not interchange. I have heard stranger things in my time but can it be true? They said only '80 and '81 interchange, Sevilles included.Any help on this matter would make my day. Even a new rad support for a good price, any sources?