All the threads!?!?! That is quite a few these days.
Good timing though, I've found an 80 tailgate (just today)at a salvage yard just south of me, I am going down there on Saturday to pull it.
I am in the middle of redesigning the tailgate lids in general, if the new construction works out the 80 series will be simple to make. I will know for sure this weekend, so stay tuned for an update.
Heres a pic of the new construction: I am attempting to build the lids almost entirely from the laser cut parts to cut down on fabrication time. If it works out, they will cost me twice as much to make, but hopefully take half as much time to make. I am too far behind on the "lists" to keep fabing them the same way.