I've done several 73s and 74s,
I don't know if yours is the same, but I would guess it is.
No plumbers putty for me.
I cleaned and repainted the window channel.
Then used black polyurethane roofing caulk from Home Depot.
This.
http://www.acehardware.com/product/...345&KPID=1045254&kpid=1045254&pla=pla_1045254
Set the rubber in it. Installed the glass and cleaned the excess with mineral spirits.
By doing this I've been able to change the glass later without the gasket moving.
I use several rounded and smoothed putty knives to show horn them in and out.
Just don't twist them. Other than that they seem pretty tough.
I just bought some white yesterday for a drip rail redo.
Every thing on the shelf there except this was water based.
BTY, I also reused my old gaskets but kept the stretched between some post with a come a long until time to put them in.
The old ones don't seem to go bad but they do draw up once removed.