Convertible top -- Dart

Anyone have any experience with replacing a power convertible top on a 67-69 Dart? I have a quote of $700 from a local shop to install the new top on my 69, but I was thinking of doing it myself. I have the service manual for help, and all the parts to put it on including the seals, gaskets, stay pads, cables, well liner etc.
How hard is it to do this job?
The original top is still on the car, but it's full of holes and the back window has been cut out.
Any advice is appreciated.

Thanks fellas.

George :glasses2: