Not totally sure but they look like they might be from an earlier CJ-5.
Hard to tell with them upside down.
The only difference in tops from a later CJ-5 and an earlier one is the angle of the front. The later ones have a greater angle.
Looking at the top corner closest to the windshield, it looks to be close to a 90 deg. angle which would lead me to think they were from an older CJ5 and won't fit your 78. Can you get any better pictures from the seller to be sure?