No need to get discouraged, we can get it all figured out Even with your weight on it that chain angle still doesn't look right. Its better, but still looks as though it will wear through that slider.

From a quick google the stock 86 shock should be 15". someone will correct me if I'm wrong here. I'm also fairly certain that its the same length as the newer LTs.

So many different parts get put on these bikes in an attempt to get them in one piece it can be a crap shoot trying to figure out what has been done to them. If it'd help I can take some measurements and pictures of my bike tomorrow. Just let me know.

Q2W will also be able to help out. Hell, I could also be way off base.