I cheated and made a cut at the center bottom of the seal. It has never leaked on either window. Where the seal attaches to the chrome strip at the rear, I drilled out the old rivets and used pop rivets on the new seal.

BTW, if you want to replace the fuzzy stuff for the roll-up window on the other side of that strip, 140 window stuff works great in that location (it's wrong for the rest of that window). The window will wind stiffly at first, so you may want to put a little silicone lube on the new rubber, but it'll loosen up with some use.

If yours is a 4-door, same goes for the rear strip for the back windows.