Originally Posted by Chico
Now that I look at it again, your seals look upside and backwards compared to mine. Iím no expert on these vans so maybe there is a reason for that but see pics below.
WOW YOU'RE RIGHT. THEY'RE BOTH UPSIDE DOWN. Actually, I tested the seals, and they both work! It's rained multiple times since I posted this and each time, no water got in. I messaged the previous owner, and he said for the work, they'd sometimes have to leave the doors open during rain, so I think that's probably the issue that caused the moisture in the first place. So, all I have to do is fix the rust.
And turn my seals right side up, apparently...