People with 77's need to identify the year because its amc's bastard year for the cj. Some parts are 76, some are the same as 78+, and some are 77 year only and are near impossible to find. So without identifying its specifically a 77 you can get bad information from owners of other years. Welcome to the club.
I just bought a 1977 CJ7 and have already uncovered lots of "interesting" things about it; for instance, it has a YJ tub on it and the previous owner didn't know why the tail gate didn't close quite right.
I love this beauty and am looking foward to straightening out all of the wierd little things that are part of it's personality.
"Not all those who wander are lost." J.R.R. Tolkien
Just my 2 cents.. I had a 77 cj5 for a while and I now own a 76 cj5. I would presume the 77 was more of an upgrade from the 76. I think the big changes were the increase in slant to the windshield, front disc brakes, and did they change to a dana 30 from a 44? not sure if I am correct there.. beyond that much was the same from what i can tell. Anyway Cheers