320s new front window metal hinges slightly bent and wont allow hinge into window slot....

Picture would be helpful and year.

Do you have separate leaf hinges?

Or a pair of continuous aluminum extrusions at window top, the length of the window opening? 

If this is the case the male bulb on the window edge feeds laterally from one end (and not the other?) into the female slot affixed to the Tab opening. 
If sticky, you may be able to gently 'chase' the opening with metals tools, lightly file the male bulb if kinked, and either way spray with silicone to enhance slide.

There is a set screw in the face of the female extrusion to lock the window from sliding laterally. Back it out first.  Nucamp stripped mine (of course) for consistency with all other screws on the Tab.

If a replacement window part, mic the diameters to see if old and new parts are in fact compatible.  I would not be surprised if they differ.