66 Dart 270 Convertible

I';m new here so hope I don't rain on someone else's parade.

1) My Dart was a Florida car and the dash pad is cracked and really crappy.

I picked up a used in fair condition pad at MoParFest last week, so now how in blazes do I replace it???? There are 5 (bolts?) on the back but are VERY difficult to access. Suggestions please.

2) how difficult is it to replace the top? Can someone with some ability do it or should I go to an upholstry shop?

Ok folks - that a start. All suggestions would be appreciated.
66reddarft