1967 Buick Riviera quarter window adjustment/alignment

[diazteca]

who out there has experience on vintage gm car quarter rear glass alignment i am right there! but it is a 67 riviera almost exact to 67-69 camaro/firebird quarter window, except no lower rail adjustment, the problem!! so how do u bring it in??.. its all lined up straight but quarter at the very top is about 1/8 to 1/4 outward and should be more inwards to inside of car, not foward or aft but side to side, ive been trying to understand it, door window is were its supposed to be so the problem is in the rear quarter window, anyone feel free to chime in.. thank you