also, does the head seal marry up with the door seal somehow? if so, I may need to wait till I get it before installing the door seals with glue
They fit together with the windshield header seal, the header seal fits inside the door seal at the top.
I had to cut mine to fit, I think they were LMC and are fine. Most of that stuff is made in india regardless of where you buy it. My header seal is from LMC and the first one they sent me was too long, sent another no questions asked and was fine. This was about 5 years or so ago and they had some fitment issues then, I don't know about now.
I only used glue where needed. The backside at the top is only an issue when the top is off. If you don't need glue don't use it.
NOS stuff is out there but its gold plate price.

