OER Parts offers a wide selection of Body Panels for your 1974 Chevrolet K10 Pickup. OER Parts offers 1974 Chevrolet K10 Pickup Full Firewall, 1974 Chevrolet K10 Pickup Partial Firewall 1974 Chevrolet K10 Pickup Firewall Body Mount Patch Panels, 1974 Chevrolet K10 Pickup Firewall To Floor Braces, 1974 Chevrolet K10 Pickup Firewall Extension, and 1974 Chevrolet K10 Pickup Firewall Delete Plate.