I'm pretty sure that ALL 140 and 240 windshields (67-93) are the same size, though there have been several different methods of mounting and styles of trim over the years.
67-69: Rubber gasket with molding in slot in the rubber
70-79 (?): Glued in, with rust prone steel clips to hold stainless steel molding to body
80(?)-85(?) Glued in, plastic clips to hold anodized molding to body
86(?)-89(?): Glued in, with wide molding (of various types) attached to glass
90(?)-93 Glued in, with plain narrow molding attached to glass, pattern of dots (known as "frit") on inside of glass to hide the glue

Several different types of windshield too:
Plain clear glass
Plain tinted glass
Tinted glass with dark blue band at the top
Tinted glass with dark blue band at the top, embedded radio antenna.
Tinted glass, dark blue band, "frit" around edges.

A friend of mine recently put a windshield from an 85 into a 93. It fit hust fine, only problem is that you can see the glue from the outside.