Ive removed 1600 windows a few times now. I first practiced on a couple wrecked (KE55?) Corollas.
Lucky too as i broke one the first time but have since done all of my datsun 1600 window rubbers that were worth saving.
(just cut the rubbers off if they are cracked or not needed again).
Heres how i did it neway:
Removal;
Ensure wiper blades are removed or out of the way.
Helps if interior rear vision mirror is removed also.
Cover the bonnet and leafbox with a rug (incase window slides/falls on the paint etc).
Firstly get someone to help you.
Get them to sit in the left hand side chair and hold a bit of pressure evenly on the top of the window with both feet.
With this foot pressure held on the inside of the window start to pry rubber lip off of the inside top corner of the window.
Slowly work your way across the top of the window where the pressure is being held on the inside.
Work your way back and forth along the lip of the rubber and you will notice the window start to push away in this corner.
The window glass will flex slightly but dont push it too hard, or it will crack and break!
When it does start to push outward slightly, shuffle the feet across the window bit by bit levering the rubber lip away as you move across and work towards the right side.
When you get past the middle of the window, get the person assisting to sit in the right hand side chair etc to put pressure on the right side as you go.
When the top right side of the window eventually starts to push forward, start to work down both sides of the windscreen starting at the top of each corner and working down.
The window will pivot forward and away eventually. The bottom of the window is the last to come out.
Make sure you catch it when it does come loose and it may be covered in black mastic (sticky messy sealant) so find a clean spot to put it down where it wont make a mess!
Installation;
I used the rope trick (6mm rope) around the rubber lip combined with a hook i made to help pull the window lip inward.
Remove both dash top covers at base of window.
Position window with rubber already mounted on it starting at the base of the window i.e reverse order to removal.
Again using someone to put pressure from the window (this time on the outside) and use your hands to work the windscreen downward whilst pulling the rubber lip inwards with the rope ends and hook to bring the window rubber back over the lip in shell.
The rope ends should meet in the middle of the bottom of the window rubber so that when they are pulled, the top section of window rubber should be the last to fit in.
A fair bit of pressure and force is required to move the rubber as it is a fairly thick section.
Be persistant and practice on a junk one first.
Hope this helps...
Nick