I'm buying a '93, and will be driving it ~300 miles to home. The headliner is sagging enough that it rubs the top of my head, regardless of seat position. It's fine for a short drive, but would drive me crazy for 5-6 hours. Is this an easy fix? If so, I'll do it when I pick up the car. If not, I'll have to find an interior shop and wait for them to fix it before my drive home.