A/C Firewall Box Delete Cover for 1970-81 Camaro / Firebird cars Your heater and defroster will remain functional . This cover replaces the evaporator box. Cover Size : 3.25 " depth on blower motor side                    2.25 " depth on the tail end                     5 " Hole diameter All kits are sold as unfinished products, prep-work (i.e. sanding, cutting, filling, body work and primer) and painting is required for the best finished look. Items come in gray primer. Professional shop with body kit installation experience recommended.