68 Valiant 100

you will have to take out the front and back glass to do the headliner. Under the gaskets for the windows are small steel spikes that the head liner spears into to hold it in place. Then the front and rear glass gaskets seal around this and makes a clean trim. The rear package tray is also done prior to installing the rear glass. The gaskets are very hard to find Steel rubber products has them but they are not cheap. If you gaskets are good be very careful with them.