Which "drag race" master cylinder?

Johnny Dart said
Rememer, you will need the 4-2 bolt adapter to run that MC. If I remember right they were $50-$75.
So if you do the math, Dr Diff isnt that bad of a deal.

PS: Ill be your huckleberry. Run one off a 5th Avenue, youll be fine.

You could skip the adapter and just drill two holes through the firewall and nut and bolt the master cyl between the 4 studs.