When Ford redesigned the Mustang for 1969, it also redesigned the doors and windows. With each Mustang redesign has come fewer and fewer parts to both simplify vehicle assembly and improve cost per unit. Weatherstripping is no exception. There was less of it for '69-'70 along with improved sealing. Instead of parting the door and roof rail weatherstripping at the door's leading edge on top, Ford moved this annoying gap lower toward the door bottom to shut out wind noise and moisture. We're going to take you to Mustangs Etc's new shop in Southern California's San Fernando Valley to show you how professionals perform weatherstrip replacement and how you can achieve the same outstanding results.