1964 P/U headliner

Hello all... I'm restoring a 1964 A100 Pickup and am wondering what Dodge did as far as their headliner goes...? The P/U I'm working on doesn't have a headliner installed, but I see remnants of what looks to be sprayed on glue.

I also own a 1967 A100 Tradesman Van that I purchased over 20 years ago, it had its original headliner still installed, it's a painted gray fiberboard.

Just wondering if anyone knows the history and has an image of what they did in '64...?

Thanks!