First of all, relevant to our earlier conversation Mako, it is
-12 degrees 
here in my garage so if you want to factor in some shrinkage to my measurements it may be justified.
Anyway, one difference is that my car has the outer window felts and trim at the window ledges but the measurements I took were around those attachment points to try and be consistent to yours. I measured body to body only so the trim would not be a factor.
At the rear of the pass quarter window slot I get 1 5/16"
At the front of it I get 1 1/4"
My pass door slot is mostly 1 1/2, and I measured at the mirror and before/aft the window stabilizing clip with felt on it, window guide they might call it.
My drivers qtr window slot was a touch narrower at the rear I got 1 3/16 and maybe a fat 1 1/8 at the front.
My Drivers door is the same as pass.
My car's body is all original behind the firewall.