I really don't remember. It depends on the spline on the input shaft. I was working at CarQuest and I remember looking through the books for something with a hub that would fit within the center recess of the flywheel & clear the bolts. So, I doubt if it is the standard early GM spline. Probably close to 20 years ago.

"I wonder if God created man because he was disappointed in the monkey?" Mark Twain