A-body quarter window rollers

Get the kit and replace them all.
Everything else is jammed up or dragging cuz the factory grease went hard.
The front roller carriages will be dragging hard on the guide, the rollers will be jammed, worn flat, or the carriages cracked.
Take it all apart, and clean and lube everything.
Then it'll work as it used to.
Been there a few times, there isn't a shortcut.