Interior and Upholstery 66 Mustang Convertible ¼ Window

Your adjusters must be set high

They are on the inner part of the body where the window regulator bolts up .They are a single bolt that slides once loosened,the window stop is on the inside .They are probably slid all the way up and need to go down .They are near the bolts for the regulator .There may also be a rubber round block in the slide track all the way at the bottom ,it may be set to high ,it will have one bolt in it as well .loosen the bolt and slide the rubber block down until the window sets where you want it to and tighten it up again .