Options in 77

[beaterC10]

I just got my new parts truck home and have a few questions for the experts. It's a 77 Cheyenne with later model interior and bed that was hit hard on the front. The frame and front clip are junk, but it has a loaded rustfree cab and bed. The dash pad is 81-87 and the seat is a either 81-87 or 88 and later.

How rare or desirable is the factory AM/FM/CB radio option? I've never seen one before, didn't know they even existed. This has a 40 channel CB built into the normal Delco radio. Seems to work, but the only antenna it has is in the windshield.

Should a 77 have a voltmeter or ammeter? This one has a
voltmeter.

How many leaves do the heavy rear springs normally have. This has 7 or 8 plus the helper. The top of the bed hits me about chest high.

I almost hate to part this thing out, but it's a longbed, so I don't feel quite so bad.