I just bought a t5. The owner said it came out of a 90's s 10. There is no tage so I was wondering how to id it. Is there anyother way without the tag?

I know the casting numbers mean nothing but it does have an electric speedo and a .72 5th gear and a 14 spline input shaft. What year was the electric speedo introduced?
Any help is geatly appriciated.
Rick......