I really loved the open headers
Are you going to put the 77 trim back on? If not I'm sure you could get a penny for some of those pieces since they were rare. I had a couple of good ones and I'm kicking myself in the butt because I threw them away without knowing what I had.
Coming along good. While the core support is apart, you might want to check into replacing your core support bushings while you have easy access to them.