Started on another facet of this project.
I had the underfloor clutch brake assembly from the original pile of parts I pulled out of the barn in Washington. It was heavy, massive, and the wrong configuration for this new powertrain.
I looked at off the shelf assemblies from Wilwood, Tilton, Speedway, Empi, etc. Any of these would have worked perfectly. But... that would be too easy.
After a bit of head scratching and studying the underfloor assembly, I realized that all I needed to do was turn it upside down, flip it end for end, cut down the frame, rework the pedal arms and modify the brake section from power to manual.

So I took it apart, cut and welded the arms, and then started mocking it up in accordance with the dimensions on a helpful drawing from Wilwood I found online.

I already had the round clutch and brake pads, and a spoon pedal for the throttle. I can always change them out later if I find I don't like them when I get this running and on the road.
Clutch side was pretty straightforward, the brake side is going to require a bit of frame rework to change from power to manual. I'll wait until the new master cylinder gets here before I tackle that side. I also pared down the frame, didn't need the support for the vacuum booster or the cast iron master cylinder.
Still waiting on the new manual brake master cylinder to arrive via the brown truck, at ~1500# I don't need the added weight of a huge power brake booster and a master cylinder that weighs almost as much as the Flathead block. I went with an Empi disc/disc master with remote reservoirs. It's compact, complements the Wilwood clutch cylinder and should stop this car just fine- I don't think when finished it will weigh any more than a VW Bug or a dune buggy.

Did a bit of polishing on the reworked pedals before calling it quits for the day.
More to come.