That's a nice pan . . . I like it, and the hump at the rear looks like a great idea for clearance, but I like the T-pan styling that matches finned valve covers, and the oil control in the t-pan. There are doors in the "T" kickouts that keep all the oil from flowing to the outside under hard cornering - they open on one side when you're cornering - the oil flow opens the door on one side and closes the door on the other side so there's always oil down at the bottom in the center. The oil that collects in the "T" gets cooled a little by the finned aluminum that surrounds it. At least in theory, it's a nice design. If it doesn't fit, though, that Milodon is a great shape for a Mustang.
I'm using an ebay knockoff of this pan on the 331 in my Comet. It's the only style of front sump pan that clears a main girdle's rear main studs due to the contour of the rear wall.