I have endurance raced a few heavy stock cars in the 24 hrs Lemons series, we did not have brake fade but then again the speeds were not cobra speeds with the big HP. Anyway, a good set of pads, slotted rotors and fresh brake fluid was all we used.
I recently upgraded a hot rod to a hydroboost system using the power steering pressure. Pressure will do a lot more than $$ for larger calipers and bling in my and many others opinions who have used hydroboost. If you have power steering, I'd look into it. The whole setup can be about the size of a vac booster system. The one I installed was remote with a slave/master driving it outside the engine compartment.
Hydroboost article super chevy