1973 Duster headliner question

thanks 89, does this sound right? im thinking about getting the ABS one without the foam/vinyl so i can trim it to fit , once its looking good i will pull it out and have my upholstry guy cover it with whatever fabric i choose...
It's pretty easy to do yourself, you just lay it on there as if and fold up one half spray both sides with adhesive and roll it back down and then pick up the other half and spray it and roll it back down and then just cut it one inch longer all the way around and the next day flip it over and spray that one inch hanging over and pull it over... Or you could pay someone to do it...