This original 1958 Chevrolet Impala frame is for any hardtop or sedan. We inspect key areas such as the body mount brackets, frame horns, and rear brace to ensure that they are still in good condition. The boxed frame also fits the Bel Air and Biscayne Chevrolet models, but is does not fit a convertible. However, this frame can be modified to fit a convertible. The rear end and front a-arms with spindles can be purchased for an additional cost.