Where front discs an option on the 70 GS Stage 1?

I am wondering if front disc brakes where an option on the 70 Stage 1 cars? My old 70 Stage was a 4 wheel drum car. But I have seen that Discs where available on the 70s also.

Just wanting to clear up some wonderment.

Thanks

Tim

 

Yes they were. My four speed stage 1 is a drum car. My automatic stage 1 has front discs rear drums.

 

option started in 67 i think