67-69 Fast back Barracuda, rear seat install

I would beg to differ!! If the hinge is unbolted from the body, I would certainly be putting the back in first! Heck, if the hinges are already bolted to the body, and you had to put the swivel bolts in to attach the seat, I would remove the hinges and bolt them to the seat first, then mount the seat back, then the bottom! And, the rear latch is operated by a lever located inside the center fish emblem on the front of the upper bun!!