I have 71. The doors are solid , no movement up or down level at windshield trim BUT it is lower than rear quarter, hence the door windows do not roll up completely. I plan to try and adjust the windows. Is there a plan B that someone has?
[img alt="Rear of window rolled up
"]https://cimg5.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x1504/img_1588_3bf97678a0739e1e7174f480f134c0e 3e1f735cf.jpeg[/img]
Rear of window rolled up
[img alt="Door low
"]https://cimg4.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x1504/img_1587_ead176ebe7fabfc29a012d4dc818c11 7065bfe36.jpeg[/img]
Door low

 

Maybe adjust the door hinges to get the door properly aligned first. Adjusting the glass is fiddley at best. And trying to adjust the glass if the door is out of alignment sounds near impossible.

 

Might not be a bad idea to post a couple pics, so we can see what you see. How far off are your car's doors?

My suggestion would be to get the door adjustment dialed in first as best as you absolutely can. Then attack the glass adjustment. The doors on C3's are a finicky fit. It's kind of a compromise of findig the best compromise between all the different angles..finding the 'best' fit you can. First start by inspecting your car's frame bushings esp up by the radiator support. If those sag it can kind of 'hunch' a car like it was kicked in the nuts. Which 'could' throw off door adjustment.

Then rule out for-sure the hinge bushings are good/bad. Lift up HARD on the back of the door. If there is ANY doubts on the hinge bushings and pins, best to put new ones in first. Another hidden issue is the latches can and DO wear out too. If you look into the 'throat' of the latch carefully and compare to the pass side ...verify the throat of the driver's side isn't worn out. There's a metal 'ramp' the striker rides on ...and a rubber bumper in the back. Those commonly wear out and owners never really know it. Those can cause the door to not line up (Park) when closed. The typical scenario is: Door hinge pins wear. That lowers the rear of the door. Striker bolt silently wears out the inner latch ramp upon each opening/closing of the door. Guy eventually installs new bushings but is unaware the latch is worn... and the door doesn't "Park" where it should. Maybe that's your biggest problem?? New door latches are not overly expensive. It's pretty easy and quick to inspect those things and rule them either good or needing replacement.

You might get lucky and new door pins/bushings and a new latch and striker bolt will get the door to line up nice w/o doing any major hinge adjustment. Presumably the door was lined up properly at some point. Rule out worn parts first. It took me more than half a day of micro-adjusting on one of my car's door until I got it dialed in perfect. Adjusting hinges takes a long time to get 'right'. Do whatever door adjusting with the car resting on all 4 tires. C3 bodies tend to 'flex' when on jackstands which will throw off any adjusting on a hoist or jackstands.

Then the windows. On the windows see how things look after you resolve door alignment issues. Your car's window tracks could be gum'd up and need cleaning. There are felt guides too which compress & wear. Plastic rollers which can crack if they're really old. It's hard to say w/o digging in. If the window drops like a brick and slow to raise up....that's a sign the spring has broken.

But do start with doors then do the glass.

 

Go to youtube and look at vids by a user named “The Driveway”. He goes over doors and windows in his ‘71 build. A few others you may want to look at are vids by Corvette C3, C&S Corvettes and Rat Farm.