I have in my 78 TA some earlier 70's TA seats, and what I think are what we have called the "horse collar" seat bottom foam pad. They are of a hobnail type material and I really like them summer and winter. The driver seat frame has the infamous seat lean inward and back. And when you sit in it goes even farther back. I'm sure something is broken or cracked in the lower piece. I've tried the spacer on the seat lug and even raised the back mounts off the floor a little and while that has helped and made it drivable, it's time to fix it right.
The original seat frame is still very good. So, can I just move the lower seat cover and cushion from the early style seat frame to the 78 style seat frame? Or, I guess what I'm wondering was there a lower seat frame change along the way during these years that would prevent that from working good? Thanks, DD