Header Panel Removal

Hello, Has anyone out there removed there front header panel /grill assembly? This would be for a 72 Challenger.
I`m trying to remove my header panel for paint....pretty sure I have every screw /bolt out but it`s still on tight. Have the center grill out.
Header panel is tight where it meets front of fenders. Looks like there`s studs on panel that go into holes on fender from pics that I could find.
Not sure if there`s nuts on end of studs or just pressed into clips. Thinking pressed in...

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