If it's the same as a 66,65 or 64 hardtop or convertible then it's easy (front door glass) Harder (rear quarter glass) really tight in the rear quarter are
the regulator has a umm mushroomed head pin that slides into the channel that is on the bottom of the glass (I used white lithium grease in mine and had to push in on the back of the arm to get the tensioner to move back and let the mushroomed head slide in) and the pin slides into the plastic piece that's in a hole in the glass. and the other end slides into the channel in the door (towards the door panel side the you can move the regulator into it's mounting points and bolt it in. then you have ton's of adjustment's to make to get a good seal and easy roll up.
I'll see if I have any pictures of it tomorrow