I've been brainstorming/dreaming about this lately too.

You might want to talk with Vetteaid---they offer a lot of the bits & pieces needed, including a custom wiring harness. It was interesting just talking with them.

Without any traction control I've been keeping my ambitions in the LS6/LS3 territory. You might consider going the LS3/E-Rod route for CARB compliance then supercharge---kind of a C6 path.

I've checked out a few C6 part-out posts and they seem to be asking a lot for LS7's.