My build sheet. I have a few questions.

[99-LS1-SS]

I have a 1985 K10. Here's my build sheet. Did they really put a 3.08 axle in these trucks? (that is rhetorical)

My real questions are related to the two options below.

1X6Z: Locking Hub Automatic. What does this mean? I've got knobs on the front hubs that say Lock and Free. What do they mean? Sorry for the dumb question. I've never owned a locking hub vehicle before.

1ZY4: Deluxe two-tone paint. My truck is a solid color. Has it been painted? IF it has been painted what two colors was it originally?

Here's my build sheet.