Headliner install, Whats needed?

Take the time to Dynamat and double-foil-sided jute mat under the headliner while you have it apart.

Bulkpak's of Dynamat Extreme with free shipping are usually always on sale somewhere. The double-foil-sided jute pading seems to be the best price at Speedway motors.

I use the aluminum duct tape with the peel of wax paper to seal any seams and along the edges.

My '70 hard top has this treatment from the bottom of the front windshield to the rear package tray, both sides and under the headliner. It sound like you sitting in a vault, and is quieter inside than a Bentley. Best part is you can't see any of it.