"as is the pack flow control valve on the A320 , i would love to meet the person that decided to put it on top of the pack."
codpiece face
Try attacking it from the front, along the supply duct, instead of bellow, make's life a whole lot easier.
The BAC 1-11, Jacking it to work in the Pack Bay's, doing anything in the stub duct area. 2 small noise generators at the rear.