Alright! Progress. Been tapping, juicing, and heating the fasteners, and my patience has paid off. Got the Dovetail Assy. off.
http://s1293.photobucket.com/user/Milibolt/slideshow/Barn%20DoorsThe pads were actually 2 pieces each. The inner pad actually has a little flex to it. Not much, but some. The pads from chevsofthe40's should work well, with maybe a little trimmage.
Hey. I picked up a tip from our new neighbor. To get a little grip on these slotted screws (and phillips for that matter) use a little grinding/lapping compound on the tip of the screwdriver. It really helped when I made my tries on the screws. Also said to get a little "mousemilk". Mousemilk?, I said. He was an aerospace worker, and said they used it all the time in the shop. So of course I will order some. Can't have enough varieties of penetrating oil, right ? :-)
I realize this issue I am yapping about is no big deal. It's part of a bigger deal for me though, as I'm working to get the doors in operation again. Both rod hooks (for the left door) need crafting. The spring for the left door closing rods need replacing (I've acquired one). The striker plate is worn out. The wedge is broken off . The surround (of the rear cargo area) has a crack in the upper corners. I will replace the 8 stovebolts and nuts that fasten the portion of the body behind the cab to the frame (as the blocks seem to have shrunk over the years. Maybe that helped lead to the body flexing that led to the damage of the latching mechanisms to the doors. Or maybe these big frames just do that. It's been this way since I've owned it. Anyway, starting to sort it out. Trying too, anyway.