This is fun to follow, and will be interesting to finally see the end result. A very ambitious undertaking. My hat goes off to you.

First question: what are you doing with all the original pieces? I'm not curious for myself, just curious. I would think that some of it would be of interest to other people, maybe all of it. Or maybe you want to keep it for posterity, reminders of how it was when you got it.

Second question: I can see that you like grays, but have you thought about using an original Ford color scheme, as a nod to the Mach 1 that this Celica body style mimics? Even striping, blacked-out hood, etc.? Not to be making a copy of a Mustang, but to acknowledge that's where this design comes from. Just a thought. Whatever you do will be cool.