Bob,
Welcome to the forum. John beat me to the "best answer" part. There are also links to Ford's service parts books for our era Mustangs (all Fords from 65 thru 73), "Ford Car Parts" (aka MPC, the 75 edition) in this forum's library. They are in .pdf format and easily downloadable.
Jim
PS: Get the paper copies. You can mark them up with notes, plant peculiarities and add Ford service stock numbers.
Jim