Transmission swap question

[Brutacus]

I found this on the Spicer transmissions. http://partsmanuals.org/spicerpartsmanuals/Spicer-6000-Series-Parts-Manual.pdf It has the dimensional data for the bellhousings, shaft length/diameter, and some other dimensional data for reference and comparison.

 

[fasttruck]

Reference post 6: why didn't they just get an Autocar or Mack ? All\ that is left of the original truck seems to be the cab.