Abstract: A hard-roofed two-door Toyota sedan is made into a convertible by the following steps:(1) removing the hard roof from the car body at the level of the top of its doors;(2) welding longitudinal reinforcing tubes in the rocker panels;(3) welding reinforcing plates to the opposite sides of the car body at the inside just above the floor between the rear wheel wells and the door posts;(4) welding reinforcing plates to the sides of the car body at the inside just above the floor immediately in front of the door opening on that side; and(5) attaching a pivoted linkage for operating the convertible top to the opposite sides of the car body.