Small Block Chevy Fitment – Designed for Small Block Chevy powered vehicles originally equipped without factory air conditioning, providing proper heater box placement on the firewall., Complete Heater Box Kit – Includes heater box housing, heater core, gaskets, and mounting hardware needed for installation and restoration of the heating system., Direct Replacement Design – Reproduction-style heater box assembly replicates the original configuration to restore proper heating system function., Durable Construction – Built with quality materials to provide dependable performance and long service life in classic vehicle heating applications., Ideal for Restoration Projects – Perfect solution for replacing damaged or missing heater components when restoring classic Chevrolet vehicles or refres.