Cut the windshield out, first: that will help immensely with dashtop removal.
Just take a carpet knife, and slide it into the gap twixt the seal and the windshield face, slice it circumferentially, then expose the the glass edge.
Do NOT prise the glass out of the remaining rubber (if indeed the glass is still usable). Make a crate to store it.
Then dash top, instruments, then harness.