The Shop Manual says it is retained by clips.This is from the Shop Manual."4. At the bottom of the seat back, bend the four body tabs that secure the seat back to the floor panel and to the wheelhouse panel. On "37" styles, the lower end of the seat back is retained by two body tabs to the floor panel only.5. Pull the seat back assembly out of at the bottom until seat back clears body tabs, then raise the seat back upward until seat back disengages from hangers on the seat back panel support.6. Remove seat back assembly from body.7. To install, reverse removal procedure, making certain that all attaching body tabs and hangers have industrial waterproof body tape applied to them to act as an anti-squeak."No bolts, just bendable tabs. What more can I say.Bruce.