Looking up the Performax filter shows it fits that engine, it's just narrower.
I say scrap both the Fram and Performax filters and pick up a Motorcraft FL-820-S. You can get them at WalMart for about $5 and they are factory spec so you know it will be the correct filter.
Here's a pic I found that shows them side by side. The threads and seal look the same, the Motorcraft housing is a little wider though.
F150008.jpg Photo by sixshootertexan | Photobucket