I am removing the top of a car I just saved from a horrible death. It just isn't worth trying to save. its a '68 chevy 4 door post.

I would like some advice on welding the doors shut for structural support when the top leave. I was also thinking of taking the inner door metal off and adding support inside the door. I will not have windows on it any more. I was thinking of leaving just the vents but don't know what I am going to do about the front windscreen yet - channels are shot.

Any ideas would be great.

I have question like:
Should I leave the door latches and just weld the door to the post?
Should I bolt into the post first?
Should I keep the hinges?
Is there a street leagal windscreen I can add that does not need a top on it, that works?

Thanks for the help