Good point Moparx - but thankfully no one here has brought up the K car system in this discussion and if they did the rear right then rear left would not hold true either. (I forgot about those split systems back in the day).
Anything merging in the common reservoir would still not dictate rr/rl then fr/fl I don’t think.
The common plastic reservoir Mopar master cylinder is open in the top of the tank to equalize the level under normal conditions. Once fluid exits the master cylinder front and rear systems are separate, or should be. ABS and some weird experiments from the past will be different. I try to not work on any of that anymore and just deal with the race/muscle car stuff.
