High HP brake advice please

[1sikride]

Hey guys..
71 Chevelle. Built ls3 supercharged.
700hp...



I have “right stuff” 4 wheel disc brakes
on it now.

City driving they stop fine.

took the car to a drag strip.
I could barley brake in time
afted I passed the finish line
before I would hit the wall.
I over shot the turn off/back lane
every time...brake fade was bad.
Pretty much ruined my night as I
was afraid to drag as hard as I know the car can

question being..

is a 6 piston caliper needed?
or is it the big disc I need ?
13” with a 4 piston?

12” with a 6 piston ?

i see a guy with a wilwood kit
4 piston 12” forsale on here...
is that a huge upgrade or meh

thanks so much.