Renovations answered already, but I wrote this, so here it is: The Camaro and Firebird glass is the same. I think the tracks are the same for manual and power windows. Only the regulators are different. But I think that wouldn't be your issue anyway, since it looks like you only replaced the window and are using the same tracks you already had in the car. I'd think there must be an adjustment there. Do you have a copy of the Fisher Body manual that shows all the adjustments? Otherwise, maybe one of the tracks is bent? It shouldn't make a difference whether the door panel is on or not.