Here is how I've installed them based on my look at originals
Sleeves are used on the sires next to/over the heat shroud and up tub over the passenger side exhaust manifold.
Starting from front most cylinder/spark plug on each side
Drivers side - No Sleeved First 3 straight boots 4th one has the 90 degree
Passenger side - First 3 have the sleeves. 3rd spark plug get the sleeved 90 degree boot 4th one has a straight boot with no sleeve
You can figure out where each straight boot wire goes based on their length, in order, and the distance from spray plug to dist cap. Longest to shortest.
Remember that the wires are not attached to the holder on the valve cover next to another right before or after in the firing order
From another thread. Shelby and Mustang (and other Ford applications) used the same wires