Julian, the following is a copy from a previous post
I have written in an attempt to assist another
forum member. I think it might have helped. I wrote
this as I had recently done the windscreen removal
to replace my crash pad. I hope this will help you
remove your windscreen and get the old dash pad out.
Go to this member's web site by clicking on the
link here:
https://www.74tr6.com/glassreplacement.htm
Do you see the extended tubes on the bottom of the
windscreen frame? There you'll find two nuts with
washers. They are on the inside of the car. Look up
near the hood latch release, then cast your eyes
backward along that plane. You'll see the tubes that
go to the windscreen with the nuts and washers. Remove
them.
Now open your car door and loosen the bolts on the
inside of the door jam. One will be holding the fender;
the other is the one you loosen. I say "loosen," not
remove.
Take a wide plastic putty knife and carefully break the
windshield rubber at the bottom of the windscreen loose
and away from the car. It could have a little glue holding
it down.
Now with a helper, step/kneel/whatever, inside the vehicle
and each of you pull/tug/jerk, somewhat, on each end of the
windscreen. Your entire windshield with glass in the frame
will pop out revealing the dash pad.
The web site you visit is that of Paul Rego. He is a
nice historian and posts great pics to help us all.
Hope this post is timely.