T160 Restoration

First thing to do is a bit of research:
Haynes manuals are ok for guidance - maintenance, oils, volumes etc - but aren't that great if a rebuild is in order.
Workshop manuals are still available along with parts catalogues, you'll need both.
A motorcycle lift is the way to go if you have the space.
To give you an idea you can't go far wrong watching Chris rebuild a T160 engine:



He has lots of videos available on his channel and they will give you an idea of where you could be going with yours.
Best of luck and keep us up to date with your photos as you progress.