Bullet Bob wrote:

I've done mine twice without that high-zoot tool.  As I recall, I just drilled out the rivet and use a rivet set/hammer and a small buck held in the bench vise.  Probably had help holding the frame over the buck but it seems to work just fine.
If I can find the "special" tools I'll let you know and you can borrow 'em.

BB1

 
I saw a few $15 punch type rivet tools when I was searching this morning.  NPD is out of the seal kit but I think they have all the individual pieces.

RTM wrote:

Has anyone installed new seals in there 65/66 vent windows and if so did you need this toolto do the job?   If the tool is needed, does anyone have one i could rent?  Kind of pricey for a one time use item.

I figured that I had enough money into the vehicle and the seal would likely last longer than I would so I went ahead an bought the tool, set the rivets, and then sold the tool for less than I bought it. I viewed it as a tool rental. BTW, the tool works well.

Ages ago I did mine.  I didn't buy a tool and don't remember exactly how I did it but I am pretty sure I had the vent window assemblies out of the doors, used my vise as the backing and a hammer (and maybe a large punch) to set the new rivets.  No special tools were used - It's lasted at least 20 years.

I used a "C" clamp that I modified to squeeze the rivet.  It seems to have worked for the last 10 years or so.