Note, for those of you with a Mustang oil cooler, if you look at it CLOSELY you will discover that the oil cooler is actually a part bolted onto the oil filter adapter. Sooooooo when the large Allen bolt through the center is removed, what remains is a similar oil filter adapter that is on every Romeo block (no coolant hose nipple).
Note, for the external oil filter adapter it's necessary to separate the two halves (remove the large Allen bolt) to get access to bolts that hold the block to oil adapter on.
If trying to be technically correct, some 2V motor did come with an external oil cooler. My 96 GT had one. Later MY 2V GT Mustangs did not have an oil cooler.
But in terms of replacing the oil filter adapter block gasket, the procedure is mostly the same. If your motor has an oil cooler, then separate the halves by removing the Allen bolt. Then proceed as normal.