Horse ****.
Every car is going to be different, here is some of the stuff that is gonna affect pedal pressure AND proportioning
Bore size of the calipers and rotor size
Bore size of the master
Engine size and weight
Tire size, type, brand, compound, and outer diameter
Weight typically in the car
MY OWN case:
67 Dart smallblock 727, with a Lincoln Versailles (9") disc brake rear and Duster front discs.
"Just to try" I am using the (67) FACTORY DRUM MANUAL cylinder and it just happened to work just fine. This cylinder has (had) residual valves in the ports, and I simply used a nail to puncture the rubbers
Proportioning is great, pedal pressure is fine for my weak old legs, and the only thing you need to do is check the brake fluid "once in a while." Mine didn't move in the season I had this combo on the road. (Torn down presently for paint)
