Does the dash have to be in to install windshield

I reversed the dash mounting hardware when I had my 67 fish apart. I found the threaded neck of the 'U' nut the same height as the nuts head and the screw length didn't really need shortened although I did go ahead and trim one thread off of each at grinder. Still to this day I'm not sure why I did this. I guess only because I could. I'll never remove the dash again.
Yes, but you are a genius in the IVR dept. So your confidence outweighs mine dramatically. I bet that dash is gonna give me problems and with 10 mins of taking out the column and 20 (taking my time) to get to 5 bolts with a wobbly, I dont have to be under the dash trying to make up new ways to butcher the queens language.

This comment is ALL theory, the friggin car has not moved since I got it in boxes 7 years ago, so take it all with a grain. BUT........we will see..........

Happy friday!!