Here's a link to the service manuals for the Velvet Borg Warner transmissions 70C and 71C. They are all in adobe format.
You can download these by doing a right click and "save file as" or "save target as"
service manual 70_71c.pdf
Nice exploded view of the transmission
Transmission install guide (has the shaft alignment and flexplate bolt torque info in it as well)
velvet drive marine tranny install manual.pdf