I have no idea how long these have been sitting and was wondering if I should open them up check them over or just some things I should look for to give them a once over?
If you do, mark the case halfs so you can line it up properly when you put it back together. Also pay close attention to the clutch disk orientation, they need to go in a certain way as well.
PS: If it were me, I would throw in a new set of clutches while it's apart. I soaked mine in friction modifier before install.