There is a number on the seal. I honestly cant remember every detail. It was 3 years ago, I believe its the main input seal for lack of a better term.
As far as the column everything is simple. Actually that was the easy part. If you have a donor truck its not to bad.
Your lucky because the hump for the zf is a bit larger than the auto trucks.
Pm me if you have anymore questions, I can give you my number for any in depth stuff and Ill try my best to answer.