Iv'e got an 81 Chevy Van with a sliding door the exact same color you can see it on my channel. My rear windows also did not pop out, so I went to the junk yard and bought a set of pop out windows and installed them. They only cost me $30 for the pair including the rubber seals.
These look cool and I'm interested in putting some on my van. But I have one question, it looks like you can kind of get your hand inside the Louver to clean the windows what's your experience been with cleaning your back windows?
What happens if water gets in between the glass and louvres? Are there drainage holes in the plastic or would it just collect inside? Or am I missing something haha