Fan shroud seal ('57 thunderbird)

[yblock57]

This has been bugging me for a while. Just put a new water pump in the bird and while installing the fan shroud I wanted to get this seal gap resolved.

I've replaced the seal with one from CASCO, and has never fit right. In the pics below I tried to show how there's a gap. I've loosened the upper shroud and tried to 'flip' the edge up but it doesn't want to stay that way. Am I missing something here? Thought about just 'roughing it' and forcing it up and tightening the thing down. Anyone else had this issue?

Please excuse the dirt & dust. getting ready to clean it up for a show this weekend.