I saw somewhere that someone has a way of converting the side windows so they open from the bottom instead of the top. Sadly, I didn't bookmark the page.
Thanks for the link. I watched it and it does give me SOME pointers. But, my side windows are held in place by four clamps each, so removal won't be as involved as his Bluebird.
When I was a kid, I rode a bus that the notches in one of the windows were worn out. It always slid down to the first good notch, about one and a half inches down. SUCKED in the early morning winter.