I have been involved directly with the manufacturing, wholesaling and retailing Mopar restoration parts for over 28 years now. We are still very active in the industry and supply many of the vendors whether large or small and restoration shops with products. We started out specializing in weatherstripping and still that is a large emphasis for us.
For the majority of the weatherstripping, certain pieces will fit better based on year or body style. That is why we mix and match our weatherstripping kits. Most vendors will only offer one brand, for example Metro. Due to our position, we stock and offer seals from Clesters, Metro, Precision, RSSI, Soff Seal and Steele. After all of the years, we know that the best door seals are XYZ and the best roof rail seals are ABC and MNO puts out the best trunk seal. Many people confuse Metro Super Soft with Soff Seal. They are two entirely different businesses.
As for as the pucker in the vent window seal, I am not referring to the area around the vent pivot point. Rubber extrusions can vary greatly with the slightest variation in speed, temp, cooling rate, component mixture, etc. Even with relatively precise machinery, a slight variation in atmospheric conditions will impact the result of the finished product.
For you guys who venture over to FABO, FBBO, FEBO and the other sites; we are a site sponsor over there. If any questions, just drop me a private message.