something like this may solve part of your problem.
https://www.raceramps.com/car-storag.../flatstoppers/
I keep my windows closed but I have not had a water problem either.
Good luck, I am sure others will chime in with additional solutions
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2SS Convertible, MRC, NPP, A8, Garnet Red, Blk Bowties
GM CAI, Ported TB, Kooks Headers, E85
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