I believe I’ve searched all over and haven’t found a thing except to get a whole aftermarket frame & go from there. If you’ve installed a decoder in a PA made by ConCor let me in on the procedure — please!
While I have not done one I do have those PAs, at least two of the versions. The frame is split into three sections and are isolated so it seems that an option would be to mill the top section to accept a decoder. Another option that I have seen discussed is to install the decoder in the dummy B unit and also to modify the trucks for pick-up for increased electrical pick-up running fine wires between A and B units.