Does a 69 GT500 use the same trunk seal that is on a 60 Mach? This is what came with the car
correct but mustang coupe and vert use a different type than fastback.
Sorry could not find one pulled off of or away from an original trunk lid to show a cross section but offer the following in the hopes it will help. From a convertible example
(https://www.concoursmustang.com/forum/gallery/17/6-090622162736-174232426.jpeg)
69-70 shelby fastback and verts use same type only different lenght.