While I agree it is unlikely that the opening size changed, my car sat for 20 years with no glass in it. The windshield is a part of the structure of the roof..
Anyway, that is what the guy said...
The new glass is about 1/4 thinner than the factory stuff as well.
Not in your era of cars.. The "windshield is part of the structure" thing came out later 74-75 so cars could be lightened for fuel mileage. This "structure concept" was about rollover accidents. BOGUS that a broken WS is going to add any structure to a roof.. The door glass, backglass, yes until they explode ( tempered glass)....
1/4 " thinner? there is no way.. Installed thousands myself and there is just not enough glass to start with to subtract that much from the thickness....
