made some great progress today although it doesn't look like we did. We figured out how to mount the new piece in with the rest of the dash.
At first we were going to try and use the factory mounting clips, we'd have to build a false back to put some posts that would hold the clips, then get them lined up exactly so they'd fit the factory holes. Decided that was too much of a pain in the ass. So instead, we built a bracket that gets mounted to the 'dash internals' - sorry, don't have a pic and it's the best I can describe. I can get a pic later. The new lower dash piece that we're building slides over the bracket and we screw in to the bracket, securing the top. Kinda confusing I know, sorry. I'll get pics installing it and it will all make sense.
heres the bracket:
Then to secure the bottom we installed some 'nutserts' and drilled holes into the cup holder piece.