I've done many of the assemblies on other Mopars I've had. It's just that when I pulled the cowl cover and removed the nut on the wiper motor and the three nuts on each wiper to free everything I suddenly saw how small the openings were to remove linkage (or more importantly to re-insert assembled linkages) and thought "no way". I've got one linkage alone is over two feet long, and tiny openings of about six inches and didn't see how on earth it's going to feed through without bending it. I haven't gone back to it yet but it sure looked impossible.

This picture isn't very good for showing things because I took it for windshield gasket but you can see how small openings are to maneuver back in assembled linkages. I thought maybe '79 and '80 were different. But you all are saying no so I guess I'll give it a shot. The openings are narrow and the cowl is not deep but I'll try.