Did you purchase an upholstery kit for your pickup? An upholstery kit for a pickup or AA truck doesn't consist of much, as you probably know (lost cost). However, a kit should contain the seals that go around the door - it is called windlace. The windlace is held under the top wood piece over each door and under the upholstery board on the latch side. I have a document by Neil Wilson that shows a number of pictures of an original cab with the windlace (the windlace is a little worn but understandable). If you want me to send it to you, send me a PM and I will email it to you as an attachment.
Rusty Nelson