Hi everybody! I am new to TriFiveChevys. Hoping that someone can help me out with the front seats in my son's 57 Bel Air sport coupe. We are doing a resto-mod on the car. Installing new upholstery foam and seat covers. The back seat was easy - the front seat not so much. To get the seat cover over the bottom (bench) we need to remove the seat backs. We can't figure out how to detach the inside of the seat - both seat backs are attached to a fitting that in turn is attached to the bench.

Any help or suggestions would be most appreciated.