The Stew-Mac tuners went right in the old bushings with no fuss. They seem to be made to much closer tolerances than the old ones. I introduced a beefy set of .013 -.058" medium strings, as I imagine this thing spent most of the dustbowl years strung with Black Diamond baling wire.
Here's a video of me fumbling through some period-appropriate tunes. I apologize for the sound quality. If I do this again I'll get an external microphone.