I experienced the same frustrations. I threw it on Craig's list, EBay, etc, with no luck. I finally "sucked it up" & decided the only way to eventually sell it.
It took four years to build, fixing "factory defects", along the way. The end results is a "show winning" car.
If you "find a builder", ask for references, etc. talk to the people he worked on their cars. Hourly rate or overall cost is important. I have $20k in labor alone. Way more than I planned or expected.
Between the people on here & other websites (Pete's Hotrods on You Tube, Oakie Guys), SOMEONE has an answer for you.
If ONE SB has a problem, they ALL have the same problem.
I don't remember a windshield problem.
Pictures of your problems will help.
Good Luck & keep posting.