First up, cutting the butyl tape from between the glass and body.
Now THAT'S a knife:
Some careful pushing....
And Viola - she's out.
Same deal, other end -
A ton of really...lets say "unique" clips where used to hold the front glass mouldings on....
The 40 Ford is full of old-school "uniqueness". Since they couldn't make glass big enough to fill the entire hole back then, they made it in 2 pieces, and used a rubber channel divider in between.
My 46 MErc truck has a similar arrangement and it's interesting to note how quickly one doesn't "see" the middle bar when driving.