Which bowl is for which on a M/C?

[gsxrken]

On a stock 4 wheel disc master cylinder, such as one from a 1996 V6 Mustang that I used, does it matter which ports are used for the front or rear brakes? I assume it does not, but since I regularly see the rear bowl going to the front lines, I did it that way. I would suspect that it doesn’t matter, and that front/rear bias is dealt with in caliper piston sizing or proportioning valves.
Now I’d like to know if that was correct.

[Skip Fix]

Generally the larger bowl supplies the front as they have larger piston volumes to supply than rear systems.

[jaybee]

There are some applications for a stepped-bore m/c, but it's extremely rare and I can't tell you what uses it.