From a 79 Custom Deluxe a few of these parts were almost new.
Chilton Manual - Chevy/GMC Pickups and Suburbans 1970-87. no missing pages.
Newish: Ignition switch and keys (4). Dimmer switch. Brake light switch. Park switch.
Blower motor switch.
Original as understood: Blower motor resistance coil. Head light/dash dimmer switch.
Door locks w / secrets. Wiper/washer switch.
Likewise: 305/350cc Valve Covers (Oil Fill and PVC Port side is entire.
Other is eliminated to adjust valves.
: Automatic transmission torgue converter dust cover. 350 Turbo etc. trannys.
Exspansion tank, and wiper fliud caps. And two V-belts.
Leave number if you like.