I have a standard 68 Cougar that a long time back the owner had an XR-7 dash installed. I decided to keep the dash and compliment it with the overhead console. I have the console with a harness, front and rear roof brackets and mounting hardware. The question now is how do I pull back the headliner without damaging it to be able to bolt up the brackets and route the harness? Of course then I'll have to get the headliner back in place looking as good as new. Any suggestions along with either pictures or instructions?