I was thinking of disconnecting everything below right at the panel but would love to do it an easier way.
As for repairing the plastic I had a few Ideas. First , strip everything out of it so it was just the black shell. make some internal supports to get it close to the origional shape. use the panel as a form and cover it with a few layers of fiberglass, fair and sand 20 different times until it is a fiberglass replica of the origional plastic one.
Second, take 1/2 plywood and create a new dash. glass it and fair it out and do away with the trojan "POD".
third, epoxy the cracks from below to add strength and use black caulk or filler to make them look better from the top then pretend it doesent bother the heck out of me!

Any advice or insight would be appreciated!