Gonna separate these posts so it isn't one long intro post.
So I bought the truck on Aug 1 in Colorado Springs and drove it to our AirBNB in Denver without a hitch. Two days later I had some spare time and didn't want to drive it across 3 states without a plate, so I tried to take it to the DMV for a temp tag... but the clutch pedal just flopped to the floor. Turns out either the slave or master cylinder decided to kaput themselves overnight, so I drove to an AutoZone that had a Sachs master and Duralast slave in stock. AirBNB host was very nice and let me work on the car underneath one of his shade trees. My guess was that this was the original clutch hydraulic setup and a seal inside the master failed. The fluid was absolutely disgusting:
Took me about 4-5 hours with trips to and from Napa for a couple of extra bits.
I'm thinking I should rebleed now that I'm home and also replace the soft line between the master and slave because the pedal still feels a little spongey. A clutch pedal rebuild is also on the list, as the thing squeaks whenever I let off of it.