I was not able to get a lot done today. It has been a rainy day here and I had to work between the rain showers. The old girl is sitting outside the shed because the tractor is in there waiting for an oil pan gasket. It is an 8N Ford with a cast iron pan that weighs about 23kg/50lbs and the front of the tractor has to be swung out of the way as well. However, that is a different story for a different forum
I had a time getting the wiper arms off; I actually thought they were stuck but found out the tabs were bent and thus not doing the proper job of releasing the tension. After a couple of hours of trying; once I bent the tabs back into position they just slipped off. I think it is likely the leak is around the air intake, the drain hole for the water is open. It is possible the seal has shrunk around the air intake. I can not really believe GM would make the air vent in this manner, a hole with the vent pushed through it, when this style has known to be problematic for leaking in other cars.
There is also a water shield over the vent and it is possible water is getting by that as well, I removed it and will make sure I have a good seal underneath it.