Go on amazon and get a trim removal kit. It's plastic tools that shouldn't break anything. Just keep in mind, it's an old car and those door panel clips get very brittle over time. But if you take your time, you can probably get it off without breaking anything. I would recommend buying extra door clips, since they are relatively cheap and just taking your time. If you need help, I bet there are some local enthusiasts who might be willing to help you. Wish I had better advice to offer.