Hi Brad,
I have a close ratio T10, but I went with a wide ratio T10 in my car and was going to keep this other, but figure if I have any issues with the one installed, I'll just pull it and rebuild it.
I can try and get out of storage this weekend and get pics and numbers, spline and input shaft ring marks.
I also have the fully enclosed bell housing for the GS that I am not using.
Not sure what else you might need but let me know and if I have any of it, I can get you the information on that as well.
If you have a Fastenal nearby, and a ZIP, I can check with the Fastenal here and get a WAG on shipping.
Or, if you are by any chance going to the Grand Nats in Bowling Green, I can bring things if we make a deal.
:)
Michael