The Boss 5.8/6.2 (aka Hurricane) is 7 liter capable. It's short block architecture is reminiscent of the old FE 428 CJ. There may be a Boss F-150 and a Boss Mustang with this engine.
If you noticed there was no mention of the 4.4 Yamaha V-8. It's too costly to purchase or liscense and manufacture in North America.