Welcome to the site, nice Camaro! My buddy has a similar setup in a Firebird, 75mm Precision turbo... its been 9.00 @152, like 1.24 60' time so I'd say theres some potential in yours. How much boost you running?
The TCM should be located with the ECM, they're usually in the engine bay back-to-back. It'll have one connector plugged into it, and be about 4x4x1" in size. Your ECM will look slightly different, but this is what the TCM looks like:
This isn't something we change (or even have the ability to change as far as I know).
PM me your VIN number and I can search our database to see if it matches a past customer of ours.
Knocking on wood, we've never heard any of our customers being denied a warranty due to tuning.
I think the mirrors look good in black. They blend in with the window and you don't notice them. I think the chrome grille would look good paint matched silver.