I'm still not up to doing any work under the car (getting up and down like that really seems to annoy my foot), but I was able to get a little done this weekend.
I finally got the pressure switch and got it installed into the brake line:
And I have the red engine closer to being ready to run. I do still need to pull the distributor again. It seems that this intake manifold has been severely milled. I suspected as much when the bolt holes didn't line up very well with the heads, and it was confirmed when I put the distributor in, and it bottomed out on the oil pump while still 1/8" off the gasket and manifold. And it was confirmed when I examined the back edge of the manifold and compared it to the black engine. So I'll have to get a shim to raise it up a bit.