An update to this post. It appears I have managed to locate both the instructions and the window glass. Big thanks go out to High octane and gloozalot!
I'm in need of instructions for the AMT Chevy II Rat Packer. I also need window glass for the same kit. I'll have to plead complete ignorance as to what other window glass might fit this car. I'm going to guess that AMT's Twister Chevy II is probably the same window glass, but I don't know that.
If anybody has either of these, give me a holler and we'll see if we can get together. Thanks.