Veg-
Jim is absolutely correct. Do not cut the frame, remove the interior- very easy to do. Should take you no more than a half an hour to do it all. And do be careful removing the tunnel- you need to make sure the back of it doesn't hit the rear lip of the car and scratch it. Don't ask me how I know
Jim-
You forgot to tell him the secret to getting the inside rear nut on the driver's seat back on. If his frame is like mine, that nut is a PITA to reinstall. I've found that it is best to put on the nuts on the front bolts (do not bolt all the way down- only two or three turns), have someone tilt the seat forward slightly so the rear inside bolt is just sticking through the floor and then bolt it on. Even then it is tight, but doing it this way makes it much easier.
Mike