As with most swaps even the "bolt-in" ones this will be slightly more complicated than you figure. besides the items mentioned I believe you will also need the following:

As I recall the newer T Birds used a dual sump oil pan and pickup where the Granada had the earlier style front sump pan.

There is a possibility that the 302 will be heavy enough to require heavier front springs.

The 6 cyl radiator will likely be too small to cool the engine and will require to be upgraded (nothing worse than having a car that you can't drive because it overheats).

If your going to run a carburetor, the tank mounted fuel pump will have to be removed and a new pickup fabricated to replace it.

To do it right, you'll probably have to rewire under the hood from scratch (you'll need wiring diagrams for both the T Bird and Granada).

If you elect to change balancers on the 302, keep in mind that the 302 up to 80 or so were externally balanced at 28 oz and the 80 and up were at 50 oz and should not be interchanged.

This should not really be a hard swap, but as with all swaps doing it correctly and paying attention to detail is what will determine if the car is fun to drive or turns into driveway art.