I'm not sure if anything will swap over. The power steering pump can probably come from just about any 289-302 car. But EVERYTHING else is different from the manual and power steering on the classic Mustangs. The tierods, ends, etc all need to be swapped out. Power disc brakes are pretty simple though.... MustangSteve's GRANADA to MUSTANG DISC BRAKE INSTALLATION INFORMATION
a 351w will fit into your car nicely, you'll need a set of headers made specifically for the swap to clear the shock towers, but everything else should be fine. I think Mustangs Unlimited sells the headers.
Also, welcome to the site! I lived in Aiken for a while, then moved to Augusta before I left for school.