Hey Andy, Well, it's been a whiles since I've driven mine but I didn't have a seal down the back edge of the door for the reasons Shine stated. The factory seal ran around the top & front of the door. I depended on the windlace, which was fitted around the interior side of the door to seal out wind & road noise. It seemed to work well and allowed the doors to close fine.
I bought this one-piece kit to use in this rebuild but don't have it installed. Don't know if it will be worth a hoot or not....One Piece Door Seals; fits - 1937 Tudor