My 9" is out of a 77-78 Lincoln Varsalies. All jokes aside, I did nothing to the perches or the driveshaft! Its about 1-1/4 narrower on each side than the stock GM rear. Has the factory Ford disc still on it too. The only thing I changed was I bought new Calipers, pads and rotors for it and changed the 3rd member for a better one. The brake line adapter is located on the driver side axle tube. You will need to do some brake line changes. I ran a braided flex line over to that location. My car was mini tubbed and the only thing I can think you may have a problem with is using the stock shock locations if you are using them.
