Master cylinder is on the outside of the 'firewall'. Kind of in a line with the brake pedal linkage. You access it from the left wheel well. Be careful if you raise the rig to get access!
If you want others to be happy, practice compassion.
If you want to be happy, practice compassion - The Dalai Lama
1984 310 Limited Motorhome
Courtesy Parking (W/S/E/Wi-Fi) on I-5 in Northern California, 70 miles from Oregon border