Not all of the old mustangs had the hole cut in the tower to grease the control arm. Mine doesnt have them, although, there was no grease in the control arms when I took them off. So, whoever worked on my car in the past was SUPER lazy

 

Definately agree with leaving as much of the old panel in the car as possible, if you can. I had to replace the right fwd apron, lower rad support and upper rad support. It's a lot of work. If you decide to cut the panels apart, make a sketch of the area B4 your cut it out including dimensions. It will help you get the new one it in the right spot