opinions/criticism wanted

I have almost never seen a “custom” interior that I liked. They just don’t go with the cars.
Now that is me.
And that being said, if I understand your design correctly, I wouldn’t mind it.
It looks simple and clean, like the original should. And with your car color one could get overwhelmed quick.
Are you going to cover the Masonite with anything or is the cost of the board about it?
For the time and work involved in anything else, I would go with repo panels.
I bet they are not cheap.
And I am a really cheap person.