[Collins] Assembly part numbers

[antqradio at sbcglobal.net]

It appears that Collins assigned new part numbers to modules and components when an assembly was reissued under a new designation.  I have been collecting components for the ARC-58 system.  So far, the antenna coupler and controller have eluded me but I have found the TRC-75 units on eBay.  I am short by one connector for the CU-523 so interconnect cables are getting close to the assembly stage.

So the questions I have are:
Is the C-1940/ARC-58 equivalent to the C-2848/TRC-75?

Likewise, is the CU-523/ARC-58 equivalent to the CU-749/TRC-75?

Does anyone have the pin outs of the TRC-75 controller and antenna coupler?  A wiring schematic would be appreciated.
TIA,
Jim