I needed to see if this all fit, but before I did, I repaired a badly corroded cab mount with 3/16" plate (a bit thicker than original).
Cab went back on the frame to check for fit. I added some strengthening ribs on the passenger side of the raised "X" to strengthen the top, since due to the lateral angle of the driveshaft, it was no longer trapezoidal.
Welded on, and I am -very- pleased with the result. Driveshaft clears the back of the cab by 1/4".
Glory shot, control arms on the ground: