And FYI, my gasket from sor looked like that, the reason for the tape. Tape it to the glass and let it become a little more comfortable with its new living arrangement before installation. Used gaskets prob fit better because they were formed over years. My rear glass was super easy to install...
A two person job, little plastic pry sticks, strong string overlapped. One pushes from outside and pull, pray, swear. Notice it didn't go the first time and it is not lined up top to bottom. Pull it out, clean your soapy hands off, try and redo the string. Clean hands again. Soap it and voila...