If it is running down the drivers side firewall, inside or out it can be only 1 of 2 things (well it could be both) but since the brake master is not actually bolted to the firewall it is more than likely the clutch master. If it were the brake master you'd see it on the booster before it got inside. If you are constantly filling 1, the other, or both then that would be the one leaking. Of course if you ar putting a drop or 2 everytime you service your truck then that's just the brakes/clutch adjusting as the wear. For the most part you shoul almost never have to add to the clutch master or it has a leak.
Good responce Rocksurfer.
I was stumped.
I did have fluid dripping down my clutch pedal leaving a dark spot of hydro fluid on my carpet (replaced it)
