Help Mustang People!

I don't have a Mustang, however, I am just trying to help out a friend. He has an '85 Mustang - which to my knowledge he is doing a race build-up on - and he is looking for the first gear ratios on both and automatice w O/D and a C4 trans. I don't know where to start looking. If anyone knows what the ratios are or if you can help in any way, it will be appreciated. Thank you very much. MM.