Did another HPDE at NCM over Memorial Day wknd. Over the winter I had the transmission rebuilt/upgraded to a TKO-600 spec, and replaced all the bearings/races in the Panoz semi-remote shifter.
Same issues with shifting. It works fine when cold and upshifting when leaving the hot pits. Doesn't like downshifting and rev matching was required. As the transmission warmed up, it wouldn't upshift consistently, either.
I'm too emotionally hijacked at the moment (and it's been several days) to go out and look at the car much less actually work on it.
For mufflers, I used Summit Racing chambered mufflers, 3" center in/center out, located about 3" behind the header collector. If I was over 103, the sound police didn't black flag me.