Global circuit breaker for an SC...
 

100amps? 150 amps? Anyone with a racecar running one?

If you were putting a big circuit breaker after the battery to feed everything but the starter, what would you use?
A breaker like this:
https://images-na.ssl-images-amazon....1x-lREahiL.jpg

Come to think of it, everything in the engine bay is fed off of the starter lug through a separate 50amp breaker, so take that out of the equation.

So, basically the entire front fuse panel, what would be a safe breaker value? I have A/C with extra fans, things like an AFR gauge, USB ports, no stereo, no power seats, 90/100W headlights, all LED lighting elsewhere.

I would think 100amps would be plenty, but maybe someone has experience.