Trunk lid alignment

I will say two things. First, @Alaskan_TA is right. the new seal is definitely 'fatter' than the old one. If you adjust the latch so that it closes, but is a little lose, the seal will wear in, and you can tighten the seal down after a time. Second, I don't know about 66, but the decklid seal on my 69 FB would go on one of either two ways. I chose poorly. No matter what I did, the decklid would not close. I got a new seal and installed it properly. Problem solved.