Hey Boone, Love the posts. I havent been on here regularly for some time. I just bought a 1999 310 SE as well. 2300 original hours. Was kept inside all its life. I am just beginning to start to use it but looking for advice on lots of things so I enjoy the posts.
Sounds like you got a nice low hour machine. Got any pictures of it? Mine is the exact opposite...sat outside the last 23 years. I'm surprised some parts of it look as good as they do. Looks like there are a few 310 SE owners on the board which always help.
EDIT: You beat me to it...that's a beefy machine. Cool! I've looked mine over for leaks while I have all this apart. I'm replacing the water pump while I have it off - it was fine and not leaking, but while I have everything apart...