Hi All, I am posting some pictures of my 78 NYB that, like many of our cars, had a roof rail weatherstrip problem. New weatherstrips are pretty much unobtainable so I did some research and found a GM extrusion for the weatherstrips and also a GM extrusion for the vertical quarter glass seal on the rear window. In the pics you will notice that the old weatherstrip ends need to be cut and reused and the new weatherstrip is glued onto them with 3m weatherstrip adhesive. It's black and buried so you won't notice it. The parts are available at Restoration Specialties and the contact info along with part numbers are shown below. (NOTE: THE REAR WEATHERSTRIP JOINS UP AT THE TOP OF THE C-PILLAR> USE YOUR OLD WEATHERSTRIP TO CARRY ON FROM THAT POINT, it's a different extrusion and should not be damaged like the roof rail will be). Here is that quarter glass seal profile. Another hard to find part. It also is a GM extrusion but appears to be a dead ringer, nice and soft too. The new quarter glass seal will be a tight fit and you will need to sand it so it will fit into the track. I used 220 grit paper taped down to a bench then take off about 1\16" from the extrusion so it will slide into the track. (Do NOT REMOVE THE CHROME STRIP FROM THE REAR WINDOW. Use WD-40 and slide the quarter glass rubber up and out and slide in the new one) Here it comes again, the company that carries this stuff is Restoration Specialties and they only carry the extrusion which means you must use your old ends. The contact and website is below. Ask for Dave Jr. as he is aware of this GM extrusion number that fits our cars. Restoration Specialties & Supply, Inc. The part number is GM extrusion 4770 The vertical quarter glass seal is a GM number extrusion again and does work. It's 92401. The Cat Whiskers for the horizontal glass seal ar 990968 or 990969 depending on whether or not you want vent window or not. Just search the above numbers in the catalog and you will find them.