I would not be afraid to order that older panel. I just put one in my 84 Bronco II. That was the proper application and it still needed some hammer work and cutting to fit correctly. I am sure you could do some bending and cutting and make the older panel fit. That rib pattern in the middle of yours looks a little different. But I am thinking if you cut all your rib pattern out, the other panel would lay in there better after you did some bending and trimming.