Leaking Heater Core...

Thanks, guys...we'll try that this Friday, and we'll let you know how it worked!
Rob

BaDart has it right. The cowl, vent intake, passages, etc. are all welded up. So there is no nice easy way to unbolt and dissassemble to get where you would need to for a real cleaning. But a coat hanger and a hose should get you opened up, WHen you run water into the cowl vent, it should gush freely out those drains you can see when the doors are opened. You should be able to run a garden hose full force without backing water up to run over the barrier into the car.

Two added thoughts:

1) if you have access to an air compressor, you can fabricate an extension to a blow gun with a piece of 1/4 inch copper tubing or small flex hose, a couple feet long. That can help get the crud lose and flowing.

2) If you have evil trees like that, while you are already wet and dirty, take some time and reopen the drain holes in the bottom of the doors (and under the rear quarter window on 2 doors) and make sure water is flowing freely out of those, to keep the bottoms of your doors from rusting out.

I've had several A bodies, I love them, and overall, there were not too many 'design flaws' but the way leaves can easily get past the large gaps in the vent cowl grill and plug the drains, with no way to easily access and clean is one...but manageable..a good cleaning every 10 years or so is no big deal!