corvair box's need to be reversed because they work backwards from what is required. so if you turned the wheel left, the car would go right.. Corvair box's can go for as little as $50-100 if there good and tight, but you still need to reverse a stock box.. aftermarkets are available reversed, and generally in the $400 range. Wintec Fabrication sells rebuilt reversed originals for $295 IIRC.. they also sell a pretty trick raised mount that bolts onto boxed chassis