Master Cylinder for 66 Formula S

Just a question for clarification.

I have a 1966 Formula S with the stock disc brakes and the original single master cylinder. I want to change to a dual master cylinder and through my searching found

Cardone 10-3126M as being one that works with front discs and manual brakes. it says this was for 1967 Darts.

Just seeing if anyone could agree or disagree with this assessment.

I know about the adjustable proportioning valve and running the brake lines, just wondering if this master cylinder would work.

Thanks

Dave