If I want to link autocad files (Plans and details) into Revit that display the layers as all black lines in my Revit project set of drawings and will then need to output my entire set back to Autocad including the linked Autocad files so that the linked Autocad files preserve their original bylayer color properties upon export, what is that exact process? I've been trying to get this to work, but there must be a trick to it.

 Thanks