It's an awful lot of work to build the sides and top to accept the window guides. Plus most Vanagons have window defrosters in the glass. There isn't enough to gain for so much work.

A rear safari window has been studied as well. Just don't leave it open when you drive. Exhaust gets sucked in.

BenT
sent from my electronic leash

> On Jun 1, 2017, at 2:06 PM, jed batchelder <seabeejed@HOTMAIL.COM> wrote:
> 
> has anyone ever thought about having the rear window on a vanagon be able to roll up and down like truck back windows can do.  would it even be possible?