This question pertains to the vent window on a 68. Originally there was a small rubber seal at the exterior base of the vent window frame. There is actually a step in the frame face. I can't remember if this rubber is mounted to the frame at the step or is it above. The step would end up below the top of the door. If it's placed there doesn't do much. Is it acceptable to mount the seal just above the door skin at the top?