I've had a 77, but mine was quite a bit different (304, 3-speed manual). What I remember most about it is that I got it with only about 19K on the clock, and the body was already full of rust in the rear fender-well area (and in so ca, to boot). Another thing I remember about it was that it had about the worst crawl-ratio I have ever experienced. It was something like 21:1 with the stock gearing. It had 3.54 axles, and a model 20 transfer case. This info does not exactly apply to what you are looking at, but you might want to keep this in the back of your mind. If your friend wants to go rock-crawling with you, this might not be the best combination, although the automatic will make-up wonders for the crawl ratio. The automatic, I believe, has a very good reputation. You can ask Parts Mike (partsmike.com) about this. And, yes, it came originally with a AMC model 20 rear axle, and no, the model 44 was not an option in 77. The front should be a model 30, and it should have disc brakes. I've got no hang-ups with LC's... The ones I see on the trail are great. I am a little apprehensive that a stock 77 CJ might be disappointing, if you-all start comparing it with a well-built LC. If it (the 77) were for me, I would be thinking of significant changes to the drive-train. Personally, I would like the automatic, but I would be thinking of a TC change, as well as a rear axle change. And, I would also be thinking of making it 'wide-trac', which would also mean changing the front axle. Just my .02. Best wixhes.
bob