1968 Dodge Dart how hard to install a headliner?

tomt966 said
Upholstery guy down here said you need to pull the windshield. Don't know, Jon. Google "install 68 dart headliner"
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thanks.the front windshield is cracked and I do have a replacement, but no rubber seal as yet..
http://forums.moparmusclemagazine.com/70/7189810/dodge-dart/68-dart-headliner/index.html