I have the opportunity to possibly purchase an unflipped 930 transaxle with LSD along with a cable shift, small block chevy adapter, and some other odds and ends for a reasonable price. I know very little about this type of transaxle, and it would be about a third of the value of this parts package. It has been out of a car for 10 years or longer, and looks clean in photos. The owner has no idea what year it is. Aside from obvious external damage and play, what should I look for when I examine it?